Fabspeed Exhaust

Fabspeed Exhaust Muffler / Silencer Dual Outlet.

Bolt-on turbo-back exhaust system providing great sports car sound and improved exhaust flow.

FEATURES:
• Fits: all Porsche 964 Turbo 965 vehicles (1990-1994)
• Includes 4.5" T304 stainless steel waste-gate tip.
• Complete 3.0"/76.5mm tubing for maximum flow, improving horsepower and sound.
• Stainless steel mounting bracket and all necessary hardware for installation included.
• Bolts directly to the stock turbo.
• Direct-bolt on installation, no cutting or welding required.
• Dramatic improvement in turbo spool and sports car sound!

Please note: This is a special-order item manufactured to order. In some cases, please allow 4 – 5 weeks for the delivery. Special order items cannot be cancelled from this supplier once your order has been placed.

Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.

FSPOR964TMAX

The product you are viewing cross references to these numbers

Fabspeed Maxflo Exhaust System ( 1in - 1out )

Improved sports car sound; deep and throaty while maintaining street appropriate volume

Features:
• Fits: all Porsche 964 C2, C4, RS America, Euro RS and Speedster vehicles 1989-1994
• Increased throttle response throughout the RPM range with less restrictive mufflers
• Available in either a single or dual outlet configuration
• NOTE: Requires slight modification to the factory rear bumper for proper fitment of the second outlet
• Constructed from high-quality 14-16ga CNC mandrel-bent T304L stainless steel for optimum flow and maximum durability
• Direct bolt-on replacement for the restrictive facotry muffler
• Includes Oval Style Tip(s)
• All Fabspeed performance products are backed by the Fabspeed Lifetime Limited Warranty.

Please note: This is a special-order item manufactured to order. In some cases, please allow 4 – 5 weeks for the delivery. Special order items cannot be cancelled from this supplier once your order has been placed.

Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.

FSPOR964MAXS

The product you are viewing cross references to these numbers

Fabspeed Exhaust Tail Pipes Deluxe Oval Style.

Direct bolt-on replacement upgrade for the Porsche 964 Turbo (965) factory exhaust tips; improves flow and enhances the vehicle's aesthetic.

FEATURES:
• Fits: all Porsche 964 Turbo 965 vehicles (1990-1994)
• Improves exhaust flow and sound by replacing the restrictive factory tips (pictured here) with a clean straight-through design
• Angle-cut 4.5" oval shape
• Polished to a mirror finish
• Constructed from high-quality 14-16 gauge C.N.C. mandrel-bent T304L stainless steel
• Simple DIY bolt-on installation
• All Fabspeed performance products are backed by the Fabspeed Lifetime Limited Warranty

Please note: This is a special-order item manufactured to order. In some cases, please allow 4 – 5 weeks for the delivery. Special order items cannot be cancelled from this supplier once your order has been placed.

Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.

FSPOR964TOTP

The product you are viewing cross references to these numbers

Exhaust wastegate pipe.
Eliminates the restrictive catalytic converter on the wastegate for increased flow and improved wastegate sound characteristics.

FEATURES:

• Fits all 964 Turbo 965 C2 Turbo vehicles worldwide (1990-1994)

• Great sports car sound without being too loud

• Constructed from high-quality 14-16 gauge C.N.C. mandrel-bent T304L stainless steel for optimum flow and maximum durability

• Direct bolt-on installation

• 100% INTENDED for RACING COMPETITION events ONLY. Never ever to be driven or used on the public roads under any circumstances. NOT CARB approved NOT EPA approved and never will be approved. Caveat Emptor.

• All Fabspeed performance products are backed by the Fabspeed Lifetime Limited Warranty

DISCLAIMER: This product removes the OEM catalytic converters from the vehicle, and as such, is strictly intended for closed track events and off-road use only. This product is or contains a Racing Cat Bypass Pipe, which will give you check engine lights on OBD2 cars. We suggest pairing this product with racing software to prevent fault codes and check engine lights. Racing Cat Bypass Pipes are solely intended for track and race cars as they are NOT California Air Resources Board Certified and not EPA certified. You are hereby informed and warned to check your local, state, and federals laws before buying and installing these or any aftermarket parts to be sure whether usage is in violation. All installation-risk and use-risk is borne by the end-user and installer of these parts.

• 100% INTENDED for RACING COMPETITION events ONLY. Never ever to be driven or used on the public roads under any circumstances. NOT CARB approved NOT EPA approved and never will be approved. Caveat Emptor.

Please note: This is a special-order item manufactured to order. In some cases, please allow 4 – 5 weeks for the delivery. Special order items cannot be cancelled from this supplier once your order has been placed.

Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.

FSPOR964TWGCB

The product you are viewing cross references to these numbers

Fabspeed Deluxe Oval Style Right-Side Tip For Stock 964 2ndary Muffler.
The Fabspeed Porsche 964 Carrera Deluxe Oval Style Right-Side Exhaust Tip is a premium stainless-steel replacement and styling upgrade for the factory right-side exhaust outlet.

Fits:

• Porsche 964 (911) C2 1989-94
• Porsche 964 (911) C4 1989-94

Featuring a large 4.5-inch oval outlet, mirror-polished finish and lined-tip construction, it gives the rear of the Porsche 964 a cleaner, sportier and more substantial appearance while retaining an OEM-style fit.

Manufactured from mandrel-bent T304L stainless steel, the tip is designed as a direct bolt-on replacement for the original right-side outlet fitted to the stock 964 secondary rear muffler. It can also be used with a compatible 964 secondary CUP muffler bypass pipe.

What This Product Does:
The exhaust tip forms the visible final outlet of the exhaust system.

Exhaust gases that have passed through the engine, catalytic converter and muffler are discharged to atmosphere through this outlet.

Although an exhaust tip generally has little influence on engine performance by itself, it performs several practical and cosmetic functions.

The Fabspeed Deluxe Oval Tip is designed to:

• Replace the factory right-side exhaust outlet
• Provide a clean and correctly positioned exhaust exit
• Upgrade the rear appearance of the Porsche 964
• Provide a larger, sportier 4.5-inch oval outlet
• Replace a damaged, corroded or deteriorated original tip
• Complement performance exhaust modifications
• Provide durable stainless-steel construction
• Maintain an OEM-style mounting arrangement

4.5 Inch Oval Design:

• The enlarged oval outlet gives the rear of the Porsche 964 a more purposeful appearance while remaining sympathetic to the classic body design.
• Its shape fills the exhaust opening more prominently than the standard outlet and provides a subtle performance-inspired visual upgrade rather than radically altering the character of the vehicle.

Mirror Polished Stainless Steel Finish:
The exhaust tip features a mirror-polished stainless-steel finish.

This creates a high-quality appearance at one of the most visible parts of the exhaust system and complements both standard and modified Porsche 964 vehicles.

Regular cleaning can help remove:

• Exhaust soot
• Carbon deposits
• Road dirt
• Water spotting
• Tar
• Road contamination

Because the component is positioned directly at the exhaust outlet, some discolouration and carbon accumulation are normal during use.

Why Upgrading Matters:
This product does not need to be fitted only when the original tip has failed.

It can also be installed purely as an appearance upgrade.

Reasons for upgrading include:

• Larger 4.5-inch oval outlet
• Sportier rear appearance
• Mirror-polished finish
• T304L stainless-steel construction
• Lined-tip design
• OEM-style precision fitment
• Direct bolt-on installation
• Compatibility with the factory secondary muffler
• Compatibility with suitable secondary CUP muffler bypass systems

It is particularly suited to owners who want to enhance the appearance of their Porsche 964 without making permanent modifications to the rear exhaust system.

Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.

FSPOR964SROTP

The product you are viewing cross references to these numbers

Fabspeed European Pre-Muffler Pipe.
The Fabspeed Porsche 964 Carrera European Pre-Muffler / Cat Bypass Pipe is a performance exhaust component designed to replace the factory catalytic converter with a freer-flowing exhaust section for competition and off-road applications.

Fits:

• Porsche 964 (911) C2 1989-94
• Porsche 964 (911) C4 1989-94 

Inspired by the European-style pre-muffler configuration, the pipe reduces the restriction associated with the original catalytic converter while incorporating an internal resonator to help shape the exhaust note.

Manufactured from T304L stainless steel, this lightweight exhaust upgrade is designed to improve exhaust flow, enhance throttle response and produce a stronger, more sporting air-cooled flat-six exhaust character.

Because this component removes the catalytic converter, it is intended for competition and off-road use only where legally permitted.

What This Product Does:
The standard catalytic converter processes exhaust gases to reduce harmful emissions before they leave the vehicle.

For competition applications, the Fabspeed European Pre-Muffler replaces this catalytic converter with a much freer-flowing exhaust path.

Removing the catalyst restriction allows exhaust gases to pass through the system more easily.

The pre-muffler is designed to:

• Reduce exhaust restriction
• Improve exhaust-gas flow
• Improve engine breathing
• Enhance throttle response
• Support improved performance
• Reduce exhaust-system weight
• Produce a stronger exhaust note
• Provide a European-style pre-muffler configuration

European Pre-Muffler Design:

• Rather than using a simple straight catalyst-delete pipe, Fabspeed incorporates an internal resonator into the system.
• This provides a freer-flowing exhaust path while helping control and shape the sound produced by the air-cooled flat-six engine.
• The result is intended to provide a more sporting exhaust character without simply functioning as an unrestricted straight pipe.

Why Upgrading Matters:
The Fabspeed European Pre-Muffler is primarily a performance modification, rather than a routine replacement for a failed catalytic converter.

For a suitable competition or off-road Porsche 964, reasons for upgrading can include:

• Reduced exhaust restriction
• Improved exhaust flow
• Improved throttle response
• Reduced exhaust-system weight
• More pronounced flat-six sound
• European-style pre-muffler configuration
• T304L stainless-steel construction
• Direct bolt-on installation

It can also complement other performance exhaust modifications fitted to the vehicle.

Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.

FSPOR964CB

The product you are viewing cross references to these numbers

Fabspeed HJS High flow Sport Cat. 

The Fabspeed HJS High-Flow Sport Catalytic Converter is a performance exhaust upgrade for the Porsche 964 Turbo, C2 Turbo designed to replace an ageing, restrictive or previously removed original catalytic converter.

Fits:

• Porsche 964 (911) TURBO 3.3L 1990-94
• Porsche 964 (911) TURBO 3.6L 1990-94

At the heart of the system is a 200-cell HJS high-flow catalytic converter, engineered to reduce exhaust emissions while providing substantially less restriction than older factory catalyst technology. The system is manufactured using 14–16 gauge CNC mandrel-bent T304L stainless steel, providing a durable, corrosion-resistant exhaust path designed for improved gas flow.

By reducing exhaust restriction after the turbocharger, the sport catalyst can help the turbocharged flat-six breathe more efficiently, supporting improved throttle response and performance while retaining catalytic exhaust-gas treatment.

What This Product Does:

• Replaces the original catalytic converter section.
• Converts harmful exhaust pollutants before gases leave the exhaust system.
• Provides significantly greater exhaust flow than an ageing or restrictive factory catalyst.
• Reduces exhaust backpressure after the turbocharger.
• Helps improve throttle response.
• Can support improved turbo response and engine performance.
• Provides a performance-oriented alternative to an original 1990s catalytic converter.
• Restores catalytic-converter functionality on vehicles where the original catalyst has previously been removed.
• Uses a high-flow 200-cell HJS catalyst rather than a conventional dense factory-style catalyst.
• Uses stainless-steel construction for corrosion resistance and durability.
• Retains catalytic treatment while offering flow characteristics closer to a less restrictive exhaust system.

Fabspeed states that its HJS high-flow catalysts can flow at more than 90% of the rate of a straight pipe in applicable installations while still providing catalytic exhaust-gas treatment.

Symptoms Of Wear Or Failure:
An original catalytic converter can deteriorate internally after decades of heat cycles, vibration and exposure to exhaust gases.

Possible symptoms include:

• Noticeable loss of engine power.
• Poor throttle response.
• Sluggish turbo response.
• Engine feeling restricted at higher RPM.
• Difficulty achieving full boost or performance.
• Excessive exhaust backpressure.
• Increased exhaust temperatures.
• Rattling noises from inside the catalytic converter.
• Metallic noises caused by a loose or broken catalyst core.
• Strong or unusual exhaust smells.
• Failed emissions testing.
• Increased exhaust emissions.
• Catalyst housing becoming excessively hot.
• Reduced fuel economy.
• Engine running poorly under load.
• Visible corrosion or damage to the original converter.
• Exhaust leaks around the converter or flanges.

A partially blocked catalyst may allow the engine to run reasonably well at low speed but restrict exhaust flow increasingly as engine speed and load rise.

Why Replacement Matters:
The catalytic converter sits directly in the exhaust path, so its internal condition has a major influence on both emissions performance and exhaust flow.

As the catalyst ages, the internal substrate can deteriorate, melt, become contaminated or break apart. A damaged catalyst may become increasingly restrictive, creating excessive exhaust backpressure.

On a turbocharged engine, restriction after the turbocharger is particularly undesirable because the turbocharger must push exhaust gases through the converter.

Replacing a worn or restrictive converter can help restore:

• Proper exhaust flow.
• Turbocharger response.
• Throttle response.
• Engine performance.
• Exhaust-gas treatment.
• Correct operating temperatures.
• Reliable exhaust-system operation.

NOTE: In the United Kingdom, sports catalytic converters and bypass pipes do not have type approval and are not legally permitted for use on vehicles manufactured after 1st March 2001. They are not MOT compliant and cannot be used on public roads. These components are intended solely for race and track use.

For vehicles manufactured before 1st March 2001, a non-type approved sports catalytic converter may be fitted, provided it offers comparable performance to the original and the vehicle continues to meet the applicable emissions standards for its age. The vehicle must still pass an MOT test.

If you are located outside the UK, please check your local laws and regulations to ensure compliance.

Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.

FSPOR964TSC

The product you are viewing cross references to these numbers

Fabspeed Muffler Bypass IMSA Zork Tube. 

The Fabspeed Porsche C2 Turbo / 965 / 964 Turbo Muffler Bypass IMSA Zork Tube is a competition-inspired performance exhaust upgrade designed for Porsche 911 Turbo models manufactured between 1990 and 1994.

Fits:

• Porsche 964 (911) TURBO 3.3L 1990-94
• Porsche 964 (911) TURBO 3.6L 1990-94

Developed by Fabspeed Motorsport, this high-flow exhaust component recreates the distinctive short exhaust outlet design associated with the legendary Porsche 934 IMSA and Le Mans racing cars of the late 1970s.

The IMSA Zork Tube replaces the original restrictive rear exhaust arrangement with a short, large-diameter outlet that directs exhaust gases away from the turbocharger with minimal downstream restriction.

Its design is intended to deliver maximum exhaust sound, improved turbocharger response and a dramatic motorsport-inspired driving experience.

Manufactured with 3.0-inch (76 mm) exhaust tubing, the Fabspeed Zork Tube features an integrated angle-cut outlet that can be adjusted to achieve the correct position beneath the rear bumper.

By reducing exhaust restrictions after the turbocharger, this system is designed to improve exhaust gas evacuation and allow the turbocharger to respond more freely.

Fabspeed advertises performance gains of up to 46 wheel horsepower and 65 lb-ft of torque, based on its published testing. Actual results depend on engine condition, vehicle specification, existing modifications and operating conditions.

One of the most distinctive features of this product is its sound. The Zork Tube creates an exceptionally loud, aggressive exhaust character, with pronounced turbocharger whistle, spool-up sounds, crackles, pops and exhaust burbles.

Unlike a conventional sports muffler, the IMSA Zork Tube prioritises exhaust flow and sound over noise reduction.

The direct-fit design uses four mounting nuts at the turbocharger connection and an adjustable slip-joint outlet, allowing straightforward installation on a compatible exhaust configuration.

The Fabspeed IMSA Zork Tube is ideally suited to Porsche 964 Turbo and 965 owners preparing vehicles for track days, motorsport events or dedicated competition use.

What This Product Does:
The Fabspeed IMSA Zork Tube provides a short, high-flow exhaust route from the turbocharger towards the rear of the vehicle.

Instead of passing exhaust gases through the standard rear muffler arrangement, the Zork Tube allows them to exit through a substantially less restrictive pipe.

Its key functions and benefits include:

• Reduced Exhaust Backpressure: Provides a freer-flowing outlet after the turbocharger.
• Improved Exhaust Gas Flow: Uses 3.0-inch (76 mm) tubing to support efficient exhaust evacuation.
• Enhanced Turbocharger Response: Reduced downstream restriction may help the turbocharger build boost more readily.
• Increased Performance Potential: Fabspeed advertises gains of up to 46 wheel horsepower and 65 lb-ft of torque.
• Aggressive Race-Inspired Sound: Produces an extremely loud exhaust note inspired by historic Porsche competition cars.
• Pronounced Turbo Whistle: Makes turbocharger spool-up and operating sounds considerably more noticeable.
• Exhaust Crackles and Pops: Allows more combustion-related exhaust sounds to be heard.
• Direct Exhaust Routing: Minimises the complexity and length of the downstream exhaust path.
• Reduced Exhaust System Weight: Eliminates heavier original exhaust components where replaced by the tube, although Fabspeed does not publish a confirmed weight-saving figure for this product.
• Adjustable Outlet Position: Features an angle-cut outlet with a slip-joint adjustment.
• Motorsport Appearance: Recreates the distinctive short exhaust arrangement associated with Porsche 934 IMSA race cars.
• Straightforward Installation: Designed to attach directly to the compatible turbocharger outlet arrangement.
• Reversible Modification: Allows original components to be retained and refitted when required.

Symptoms Of Wear Or Failure:
The Fabspeed IMSA Zork Tube is primarily a performance and motorsport upgrade, rather than a routine replacement for a worn exhaust component.

However, owners may consider replacing or refurbishing their original exhaust system when it shows signs of damage or deterioration.

• Older mufflers and exhaust pipes can develop corrosion following prolonged exposure to moisture, road salt and repeated temperature changes.
• Severe corrosion may weaken the exhaust housing, joints and mounting points.
• Cracked pipework, failed gaskets or damaged connections can allow exhaust gases to escape before reaching the intended outlet.
• Symptoms may include blowing noises, increased exhaust volume and visible soot around leaking joints.
• Internal baffles or other components inside an ageing muffler may become loose or damaged.
• This can produce metallic rattling, unusual vibrations or changes in exhaust sound.
• Damaged or obstructed exhaust components may restrict gas flow, increasing exhaust backpressure.
• Severe restriction can affect engine output and turbocharger operating conditions.
• A severely restricted exhaust system may contribute to slower boost response or reduced engine performance.
• However, these symptoms can also result from turbocharger wear, boost leaks, wastegate faults or other engine problems.
• Corroded fasteners, fractured brackets or deteriorated supports may allow unwanted exhaust movement.
• This can produce rattling, vibration or contact with surrounding bodywork.
• Impact damage, crushed sections or deformed pipework can compromise the structural condition of the original exhaust.
• Loose connections or failed supports may allow the exhaust system to move beyond its intended position.
• A leaking exhaust may allow fumes to escape near the engine compartment or vehicle body.
• Exhaust leaks should be investigated promptly because exhaust gases can contain dangerous carbon monoxide.
• Corrosion or deformation around flange connections may prevent the exhaust from sealing correctly.

Why Replacement / Upgrading Matters:

• Upgrading to the Fabspeed IMSA Zork Tube offers a distinctive motorsport-focused exhaust configuration for Porsche 964 Turbo and 965 models.
• The original Porsche exhaust system was engineered to balance performance, exhaust noise, emissions control and normal road usability.
• For dedicated competition vehicles, a shorter and less restrictive exhaust outlet may provide benefits where motorsport regulations permit its use.

NOTE: In the United Kingdom, sports catalytic converters and bypass pipes do not have type approval and are not legally permitted for use on vehicles manufactured after 1st March 2001. They are not MOT compliant and cannot be used on public roads. These components are intended solely for race and track use.

For vehicles manufactured before 1st March 2001, a non-type approved sports catalytic converter may be fitted, provided it offers comparable performance to the original and the vehicle continues to meet the applicable emissions standards for its age. The vehicle must still pass an MOT test.

If you are located outside the UK, please check your local laws and regulations to ensure compliance.

Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.

FSPOR964TZMB

The product you are viewing cross references to these numbers

Fabspeed Primary Muffler Bypass Pipe.
The Fabspeed Porsche 964 Carrera Primary Muffler Bypass Pipe is a performance exhaust upgrade designed to replace the heavy and restrictive factory centre primary muffler with a lightweight, free-flowing Carrera Cup-style straight pipe.

Fits:

• Porsche 964 (911) C2 1989-94
• Porsche 964 (911) C4 1989-94

Inspired by the exhaust arrangement used on Porsche 964 Carrera Cup competition cars, the bypass pipe reduces exhaust restriction, removes substantial weight from the rear of the vehicle and produces a stronger, more aggressive air-cooled flat-six exhaust note.

Unlike a catalytic-converter bypass pipe, this component is installed after the catalytic converter and does not remove the vehicle's catalyst.

What This Product Does:
The standard Porsche 964 exhaust system uses a primary centre muffler to reduce exhaust noise before gases continue towards the secondary rear muffler.

While effective for noise reduction and refinement, the factory primary muffler adds weight and creates additional restriction in the exhaust path.

The Fabspeed Primary Muffler Bypass Pipe replaces this silencer with a freer-flowing straight pipe.

This is designed to:

• Reduce exhaust restriction
• Improve exhaust-gas flow
• Improve throttle response
• Support increased horsepower
• Reduce rear vehicle weight
• Increase exhaust volume
• Enhance the air-cooled flat-six sound
• Create a Carrera Cup-inspired exhaust configuration

Carrera Cup Style Design:

• The bypass pipe is designed as a replica of the type of primary muffler bypass arrangement used in the Porsche Motorsport 964 Carrera Cup racing programme.
• Rather than forcing exhaust gases through the internal chambers of a conventional silencer, the straight-pipe configuration provides a more direct exhaust route.
• This creates a more performance-oriented exhaust system while retaining the vehicle's catalytic converter and secondary rear muffler when used in the standard configuration.

Performance Benefits:
Fabspeed reports approximately:

Crank Horsepower: +12 HP
Wheel Horsepower: +10 WHP
Weight Reduction: Approx. 25 lb

Fabspeed also reports improved throttle response.

These figures are manufacturer-reported results from specific testing and should not be considered guaranteed output for every Porsche 964.

Actual performance can vary depending on:

• Engine condition
• Vehicle specification
• Existing exhaust components
• Intake modifications
• Engine calibration
• Fuel quality
• Ambient conditions
• Testing equipment and procedure

Why Upgrading Matters:
The Fabspeed Primary Muffler Bypass Pipe is primarily a performance, sound and weight-saving upgrade.

The original centre muffler does not need to have failed before the bypass pipe can be installed.

Reasons for upgrading include:

• Approx. 25 lb rear weight reduction
• Reduced exhaust restriction
• Improved exhaust flow
• Improved throttle response
• Increased horsepower potential
• More aggressive flat-six sound
• Carrera Cup-inspired configuration
• T304L stainless-steel construction
• Straightforward bolt-on installation

It provides a useful option for owners who want a noticeably sportier exhaust without deleting the catalytic converter.

Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.

FSPOR964PMB

The product you are viewing cross references to these numbers

Fabspeed RENNKRAFT Sport Cat And Comp.

The Fabspeed RENNKRAFT Sport Cat and Competition Link Pipe system is a performance exhaust upgrade designed for the Porsche 964 Turbo. It replaces the restrictive original catalytic converter section with Fabspeed's interchangeable RENNKRAFT system, allowing the exhaust configuration to be changed between an HJS 200-cell high-flow sport catalytic converter and a straight-through competition link pipe.

Fits:

• Porsche 964 (911) TURBO 3.3L 1990-94
• Porsche 964 (911) TURBO 3.6L 1990-94  

The sport catalyst configuration is designed to improve exhaust flow while retaining catalytic exhaust-gas treatment, while the competition link pipe provides the least restrictive exhaust path for appropriate track and competition use.

The system retains the original Porsche rear mufflers, allowing the vehicle to preserve a largely factory rear appearance while benefiting from reduced exhaust restriction, a stronger exhaust character and more noticeable turbocharger sound.

Constructed from 3-inch, 14–16 gauge T304L stainless-steel tubing, the system uses CNC mandrel bends to maintain a smooth internal exhaust path and provide durability under the high temperatures generated by the turbocharged flat-six engine.

What This Product Does:

• Replaces the restrictive original catalytic-converter section.
• Provides interchangeable sport-cat and competition-pipe configurations.
• Uses a high-flow HJS 200-cell catalytic converter in the catted configuration.
• Reduces exhaust restriction after the turbocharger.
• Helps improve exhaust-gas flow.
• Can help reduce turbo lag.
• Supports improved turbocharger response.
• Produces a more pronounced exhaust note.
• Increases audible turbo whistle.
• Retains the original Porsche rear mufflers.
• Allows the vehicle to maintain a relatively factory-looking rear exhaust installation.
• Provides a straight-through competition configuration for suitable track applications.
• Uses stainless-steel construction for long-term corrosion resistance.
• Provides a direct replacement for the factory catalytic-converter section.

Fabspeed states that the HJS 200-cell catalyst flows approximately 93% as much as a straight pipe, providing a balance between catalytic treatment and performance-oriented exhaust flow.

Symptoms Of Wear Or Failure:
A Porsche 964 Turbo's original catalytic converter can deteriorate after decades of heat cycles, vibration and exposure to high exhaust temperatures.

Possible signs of deterioration or restriction include:

• Reduced engine power.
• Sluggish acceleration.
• Slow turbo response.
• Increased turbo lag.
• Engine feeling restricted at higher RPM.
• Poor performance under heavy load.
• Excessive exhaust backpressure.
• Increased exhaust-gas temperatures.
• Unusual heat around the catalytic converter.
• Rattling from inside the converter.
• Metallic noises caused by a loose catalyst substrate.
• Strong or unusual exhaust smells.
• Failed emissions testing.
• Increased exhaust emissions.
• Visible corrosion or damage to the converter housing.
• Exhaust leaks around flanges or joints.

A partially blocked catalyst may allow relatively normal operation at low engine speeds but increasingly restrict exhaust flow as engine speed and load increase.

Why Replacement Matters:
The catalytic converter sits directly downstream within the turbocharged exhaust system, meaning its ability to flow exhaust gases can have a significant influence on engine and turbocharger performance.

As an old catalyst deteriorates, its internal substrate can:

• Break apart.
• Become contaminated.
• Melt or deform.
• Collapse internally.
• Become increasingly restrictive.

A restricted catalyst creates additional pressure after the turbocharger, making it more difficult for exhaust gases to leave the turbine efficiently.

Replacing an ageing or restrictive factory catalyst with a correctly designed high-flow system can help restore:

• Efficient exhaust flow.
• Turbocharger response.
• Throttle response.
• High-RPM performance.
• Correct exhaust-system operation.
• More consistent engine performance.
• A stronger performance exhaust character.

NOTE: In the United Kingdom, sports catalytic converters and bypass pipes do not have type approval and are not legally permitted for use on vehicles manufactured after 1st March 2001. They are not MOT compliant and cannot be used on public roads. These components are intended solely for race and track use.

For vehicles manufactured before 1st March 2001, a non-type approved sports catalytic converter may be fitted, provided it offers comparable performance to the original and the vehicle continues to meet the applicable emissions standards for its age. The vehicle must still pass an MOT test.

If you are located outside the UK, please check your local laws and regulations to ensure compliance.

Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.

FSPOR964TSCCB

The product you are viewing cross references to these numbers

Fabspeed RSR Header Muffler Kit, WITH Heat Exchange And Sports Cats.
The Fabspeed Porsche 964 Carrera RSR Header Muffler Kit is a comprehensive performance exhaust system designed to transform the exhaust flow, sound and character of the air-cooled Porsche 964.

Fits:

• Porsche 964 (911) C2 1989-94
• Porsche 964 (911) C4 1989-94

Inspired by Porsche RSR motorsport exhaust architecture, the system replaces key restrictive factory exhaust components with equal-length RSR-style headers, high-velocity 3-into-1 merge collectors and a dual-outlet performance muffler system.

The result is a freer-flowing exhaust path designed to improve engine breathing, increase horsepower and torque potential, reduce weight and deliver a significantly louder and more aggressive air-cooled flat-six exhaust note.

What This Product Does:
The exhaust system has the important job of carrying combustion gases away from the engine while controlling exhaust flow, noise and, depending on the configuration, emissions.

On a performance engine, the design of the headers, collectors and mufflers can significantly influence how efficiently exhaust gases leave the cylinders.

The Fabspeed RSR Header Muffler Kit replaces several major factory exhaust components with a performance-oriented system designed to:

• Improve exhaust-gas flow
• Reduce exhaust restriction
• Improve exhaust scavenging
• Improve engine breathing
• Increase horsepower and torque potential
• Improve throttle response
• Reduce exhaust-system weight
• Produce a louder, more aggressive exhaust note
• Create an RSR-inspired appearance and character

Performance Benefits:
Fabspeed reports substantial performance improvements from the RSR Header Muffler Kit.

The manufacturer's current published figures vary between sections of its product listing, with performance gains quoted in the region of approximately:

Horsepower: +24 to +29 HP
Torque: +21 to +24 ft-lb
Weight Reduction: Up to approximately 38 lb depending on configuration

These figures are manufacturer-reported and should not be interpreted as guaranteed results for every Porsche 964.

Actual results will vary depending on:

• Engine condition
• Vehicle specification
• Exhaust configuration
• Sport Cat or non-Sport Cat configuration
• Intake modifications
• Engine calibration
• Fuel quality
• Ambient conditions
• Testing equipment and procedure

Why Upgrading Matters:
This system is primarily a performance upgrade, rather than a routine replacement component.

The factory exhaust does not need to have failed before the kit can be installed.

Reasons for upgrading include:

• Equal-length RSR-style headers
• High-velocity 3-into-1 merge collectors
• Improved exhaust flow
• Improved exhaust scavenging
• Increased horsepower and torque potential
• Improved throttle response
• Significant weight reduction
• Loud and aggressive flat-six sound
• RSR-inspired appearance
• T304L stainless-steel construction
• Optional heat-exchange configuration
• Optional Sport CatsChoice of exhaust outlets

It is particularly suited to enthusiast, performance and RSR-inspired Porsche 964 builds where increased sound, reduced weight and improved exhaust efficiency are priorities.

Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.

FSPOR964RSRWH

The product you are viewing cross references to these numbers

Fabspeed RSR Header Muffler Kit, WITHOUT Heat Exchange WITH Sports Cats.
The Fabspeed Porsche 964 Carrera RSR Header Muffler Kit is a comprehensive performance exhaust system designed to transform the exhaust flow, sound and character of the air-cooled Porsche 964.

Fits:

• Porsche 964 (911) C2 1989-94
• Porsche 964 (911) C4 1989-94

Inspired by Porsche RSR motorsport exhaust architecture, the system replaces key restrictive factory exhaust components with equal-length RSR-style headers, high-velocity 3-into-1 merge collectors and a dual-outlet performance muffler system.

The result is a freer-flowing exhaust path designed to improve engine breathing, increase horsepower and torque potential, reduce weight and deliver a significantly louder and more aggressive air-cooled flat-six exhaust note.

What This Product Does:
The exhaust system has the important job of carrying combustion gases away from the engine while controlling exhaust flow, noise and, depending on the configuration, emissions.

On a performance engine, the design of the headers, collectors and mufflers can significantly influence how efficiently exhaust gases leave the cylinders.

The Fabspeed RSR Header Muffler Kit replaces several major factory exhaust components with a performance-oriented system designed to:

• Improve exhaust-gas flow
• Reduce exhaust restriction
• Improve exhaust scavenging
• Improve engine breathing
• Increase horsepower and torque potential
• Improve throttle response
• Reduce exhaust-system weight
• Produce a louder, more aggressive exhaust note
• Create an RSR-inspired appearance and character

Performance Benefits:
Fabspeed reports substantial performance improvements from the RSR Header Muffler Kit.

The manufacturer's current published figures vary between sections of its product listing, with performance gains quoted in the region of approximately:

Horsepower: +24 to +29 HP
Torque: +21 to +24 ft-lb
Weight Reduction: Up to approximately 38 lb depending on configuration

These figures are manufacturer-reported and should not be interpreted as guaranteed results for every Porsche 964.

Actual results will vary depending on:

• Engine condition
• Vehicle specification
• Exhaust configuration
• Sport Cat or non-Sport Cat configuration
• Intake modifications
• Engine calibration
• Fuel quality
• Ambient conditions
• Testing equipment and procedure

Why Upgrading Matters:
This system is primarily a performance upgrade, rather than a routine replacement component.

The factory exhaust does not need to have failed before the kit can be installed.

Reasons for upgrading include:

• Equal-length RSR-style headers
• High-velocity 3-into-1 merge collectors
• Improved exhaust flow
• Improved exhaust scavenging
• Increased horsepower and torque potential
• Improved throttle response
• Significant weight reduction
• Loud and aggressive flat-six sound
• RSR-inspired appearance
• T304L stainless-steel construction
• Optional heat-exchange configuration
• Optional Sport CatsChoice of exhaust outlets

It is particularly suited to enthusiast, performance and RSR-inspired Porsche 964 builds where increased sound, reduced weight and improved exhaust efficiency are priorities.

Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.

FSPOR964RSRWOH

The product you are viewing cross references to these numbers