Catalyst / Bypass

Blanking Plug For Oxygen Sensor Hole.
Securely seal an unused oxygen sensor port with this OE Match Blanking Plug for Oxygen Sensor Hole. Designed for compatible exhaust applications, this plug is used when an oxygen (lambda) sensor mounting hole is present but a sensor is not required for the particular vehicle, exhaust configuration, testing setup or application.  

M 18 x 1,5 x 18
23mm in length

Oxygen sensor ports are threaded openings in the exhaust system that normally accommodate a lambda sensor. When the port is not being used, it must be properly sealed. Leaving the opening exposed can allow hot exhaust gases to escape and may permit moisture and contamination to enter the exhaust system.  

What This Product Does:

• Seals an unused oxygen or lambda sensor mounting hole.
• Prevents exhaust gases escaping through an unused sensor port.
• Helps maintain the integrity of the exhaust system.
• Protects the threaded sensor opening from dirt and contamination.
• Helps reduce moisture entering through an unused port.
• Allows an exhaust component with an oxygen sensor boss to be used where a sensor is not required.
• Provides a removable solution if an oxygen sensor is required later.
• Replaces a missing, damaged or corroded blanking plug.
• Provides an OE-style solution for compatible exhaust applications.  

Symptoms Of Wear Or Failure:

• Exhaust gases leaking around the plug.
• A ticking or blowing noise from the oxygen sensor port.
• Black soot deposits around the plug or threaded opening.
• A strong exhaust smell near the affected area.
• The plug has become loose.
• Visible corrosion or deterioration.
• Damaged or stripped plug threads.
• A plug that can no longer be securely tightened.
• The original blanking plug is missing.
• An oxygen sensor has been removed and the port remains open.
• Heat or exhaust staining around the sensor boss.  

Why Replacement Matters:

• An unused oxygen sensor hole should never be left open during normal engine operation. Exhaust gases are extremely hot and can escape through the opening at high velocity, potentially damaging nearby components and creating excessive noise.
• An exhaust leak can also affect the correct operation of the exhaust system. Depending on the location of the unused port and the vehicle's configuration, unwanted air entering the exhaust may also interfere with exhaust-gas measurements or diagnostic testing.
• The threaded sensor boss itself can deteriorate if left exposed. Dirt, moisture and corrosion may damage the threads, making installation of a future oxygen sensor more difficult or requiring repair of the sensor mounting point.
• A loose or damaged plug can produce similar problems. Soot deposits around the port are often an indication that combustion gases are escaping past the sealing surface or threads.

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

333660211

The product you are viewing cross references to these numbers

Sport catalytic converter with Lambda sensor hole. 100 cell. Polished stainless steel.



Fits:
Porsche 911 2.7L 1975-89
Porsche 930 3.0L, 3.3L Turbo 1975-89

Please note: These sport cats will make your car sound louder than with stock cats. If you have ,or intend to install sport silencers, you may find the car is a bit loo loud. We recommend to use one sport exhaust component if you are concerned about decibel levels.

NOTE: 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 in the United Kingdom. They are not MOT compliant and must not be used on public roads. These components are intended for race and track use only. If you are located outside the UK, please consult your local laws and regulations to ensure compliance.

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

911PO92100S

The product you are viewing cross references to these numbers

Exhaust Catalytic converter.



Fits:
Porsche 911 3.2L Carrera 1984-89

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

93011323028

The product you are viewing cross references to these numbers

Exhaust wastegate connection pipe. Stainless steel.



Fits:
Porsche 930 (911 turbo) 3.3L 1978-82

Click 'Zoom in' for large parts diagram.
Diagram ref no 37

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

93022092209S

The product you are viewing cross references to these numbers

Exhaust wastegate pipe.

 


Fits:
Porsche 930 (911 turbo) 3.3L 1983-89

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

93012306301

The product you are viewing cross references to these numbers

Fabspeed European Pre-Muffler Pipe.
The Fabspeed Porsche 911 Carrera European Pre-Muffler Pipe is a performance exhaust upgrade designed for classic Porsche 911 SC and Carrera models from 1976–1989.

Fits:

• Porsche 911 1976-1977 2.7L / 1976-77 3.0 Carrera
• Porsche 911 1978-1983 3.0L / SC
• Porsche 911 1984-1986 3.2L
• Porsche 911 1987-1989 3.2L G50  

Based on the European pre-muffler concept, this component replaces the original catalytic converter with a freer-flowing, resonated exhaust section. The result is reduced exhaust restriction, improved throttle response, reduced weight and a stronger air-cooled flat-six exhaust note.

Unlike a simple straight catalyst bypass pipe, the Fabspeed European Pre-Muffler incorporates a straight-through resonator with stainless-steel wool packing. This helps produce a deeper, more refined performance exhaust tone while reducing the harsh rasp often associated with completely straight-piped exhaust systems.

What This Product Does:
The pre-muffler replaces the factory catalytic converter section of the exhaust system.

Instead of forcing exhaust gases through the restrictive catalyst substrate, the Fabspeed pipe provides a freer-flowing route towards the rear muffler.

This is designed to:

• Reduce exhaust restriction
• Improve exhaust-gas flow
• Reduce backpressure
• Improve throttle response
• Increase horsepower and torque potential
• Reduce exhaust-system weight
• Increase exhaust volume
• Enhance the classic air-cooled flat-six sound

Because the original catalytic converter is removed, the component no longer provides the emissions-treatment function of the factory catalyst.

Resonated European Design:

• Rather than using a completely empty straight pipe, Fabspeed incorporates a straight-through resonator.
• The resonator allows exhaust gases to travel through the system with minimal restriction while controlling some of the undesirable frequencies produced by an unrestricted exhaust.
• Its stainless-steel wool packing helps create a deeper, more purposeful exhaust character without the excessive rasp commonly associated with a basic straight catalyst-delete pipe.

Performance Benefits:
Fabspeed states that the European Pre-Muffler provides 16+ wheel horsepower and 15+ ft-lb of torque, together with significantly improved throttle response.

During Fabspeed DynoJet testing, peak curve gains of up to 21 WHP and 17 ft-lb at approximately 4,500 rpm were recorded, with maximum power increases of approximately 16 WHP and 16 ft-lb.

These are manufacturer-reported figures from a specific test vehicle and should not be considered guaranteed results for every Porsche 911.

Actual performance can vary depending on:

• Engine condition
• Engine specification
• Existing exhaust system
• Intake modifications
• Fuel system condition
• Ignition condition
• Engine tuning
• Fuel quality
• Ambient conditions
• Testing equipment and procedure

Why Upgrading Matters:
This product is primarily a performance exhaust modification, rather than a routine service replacement.

The original catalyst does not need to have failed before the Fabspeed pre-muffler can be installed on a vehicle intended for appropriate competition or off-road use.

Reasons for upgrading include:

• Reduced exhaust restriction
• Improved exhaust flow
• Increased horsepower potential
• Increased torque potential
• Sharper throttle response
• Approx. 8 lb weight reduction
• Stronger air-cooled flat-six sound
• Resonated design to control rasp
• T304L stainless-steel construction
• Straightforward bolt-on installation

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

FSPOR911CB

The product you are viewing cross references to these numbers

Fabspeed RENNKRAFT Sport Cat And Comp. Link Pipe.

The Fabspeed RENNKRAFT Sport Cat and Competition Link Pipe is a modular high-performance exhaust upgrade designed for the 1976–1989 Porsche 911 Turbo / 930.

Fits:

• Porsche 911 1976-1977 3.0L Turbo (930)
• Porsche 911 1978-1989 3.3L Turbo (930)  

The system replaces the restrictive original catalytic converter section while retaining the factory Porsche rear muffler. Its modular RENNKRAFT design allows the exhaust to be configured with either a 200-cell HJS Sport Catalytic Converter or a straight-through competition bypass pipe, allowing the vehicle to be adapted for different performance applications.

Manufactured from 3.0-inch, 14–16 gauge T304L stainless steel, the system uses CNC mandrel-bent tubing to provide a smooth, high-flow exhaust path with excellent resistance to heat and corrosion.

The Sport Cat configuration provides increased exhaust flow while retaining catalytic treatment, while the competition link pipe provides a more direct exhaust path for closed-course or off-road applications.

What This Product Does:
The catalytic converter and connecting pipe sit downstream of the turbocharger and form an important part of the 930 exhaust system.

Exhaust gases leaving the turbocharger must pass through this section before reaching the rear muffler. Excessive restriction in this area can increase post-turbo backpressure and work against efficient exhaust evacuation.

The Fabspeed RENNKRAFT system is designed to:

• Reduce post-turbo exhaust restriction
• Improve exhaust gas flow
• Help reduce turbo lag
• Improve throttle and turbocharger response
• Produce a stronger performance exhaust sound
• Replace an ageing or restrictive original catalytic converter
• Retain the original Porsche rear muffler
• Allow switching between sport-cat and competition-bypass configurations
• Provide durable stainless-steel construction

This modular arrangement allows the factory-style rear muffler appearance to be retained while upgrading the more restrictive catalytic converter section.

Symptoms Of Wear Or Failure:
The original exhaust components on a Porsche 930 can now be several decades old and may have experienced extensive heat cycling, vibration, moisture and corrosion.

Common symptoms that may indicate deterioration include:

• Reduced engine performance
• Sluggish throttle response
• Increased turbo lag
• Restricted exhaust flow
• Metallic rattling from inside the catalytic converter
• Sulphur-like or unusual exhaust smells
• Excessive heat around the catalyst
• Cracks in the exhaust pipework
• Blowing or hissing noises
• Black soot deposits around leaking joints
• Corroded or damaged flanges
• Loose exhaust connections
• Visible rust or deterioration
• Exhaust fumes around the rear of the vehicle
• Damaged or partially collapsed catalyst substrate

A catalytic converter can deteriorate internally even when its outer casing appears serviceable. The internal substrate may crack, melt or collapse and restrict exhaust flow.

Why Replacement Matters:
A damaged or restricted catalytic converter can significantly affect exhaust flow.

On a turbocharged Porsche 930, this is particularly important because the exhaust gases leaving the turbocharger need to evacuate efficiently. Excessive restriction downstream of the turbo can increase backpressure and contribute to slower turbo response and reduced performance.

A cracked or leaking pipe can also allow extremely hot exhaust gases to escape near surrounding components.

Replacing deteriorated components helps restore:

• A secure and leak-free exhaust path
• Efficient post-turbo exhaust flow
• Consistent turbocharger response
• Reduced exhaust restriction
• Correct exhaust routing
• Reliable exhaust-system operation

For vehicles with a serviceable standard exhaust, the Fabspeed system can instead be used as a performance upgrade, allowing improved exhaust flow while retaining the original rear muffler.

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.

FSPOR930TSC

The product you are viewing cross references to these numbers

Fabspeed Sport Cat.
The Fabspeed Porsche 911 Carrera Sport Cat is a high-flow catalytic converter designed as a direct bolt-on replacement for the heavy and restrictive factory catalyst fitted to classic Porsche 911 Carrera models from 1976–1989.

Fits:

• Porsche 911 1976-1977 2.7L / 1976-77 3.0 Carrera
• Porsche 911 1978-1983 3.0L / SC
• Porsche 911 1984-1986 3.2L
• Porsche 911 1987-1989 3.2L G50  

Featuring a 300-cell high-flow catalytic converter and mandrel-bent T304L stainless-steel construction, the Sport Cat is designed to reduce exhaust restriction while retaining catalytic exhaust-gas treatment.

Compared with the original catalytic converter, the Fabspeed Sport Cat provides improved exhaust flow, sharper throttle response, reduced weight and a slightly stronger air-cooled flat-six exhaust note.

What This Product Does:
The catalytic converter is part of the vehicle's exhaust and emissions-control system.

Exhaust gases produced during combustion contain pollutants that pass through the catalyst before leaving the exhaust system. The catalytic converter uses its internal catalyst substrate to convert harmful exhaust compounds into less harmful emissions.

The Fabspeed Sport Cat performs this basic catalytic function while using a higher-flow design intended to create less exhaust restriction than the original factory converter.

It is designed to provide:

• Catalytic exhaust-gas treatment
• Improved exhaust flow
• Reduced exhaust backpressure
• Improved throttle response
• Reduced exhaust-system weight
• Slightly increased horsepower and torque
• A sportier exhaust tone
• A modern replacement for an ageing original catalyst

300-Cell High-Flow Catalyst:

• The Sport Cat uses a 300-cell high-flow catalytic converter.
• The catalyst contains a structured internal substrate that provides the surface required for catalytic reactions while allowing exhaust gases to pass through the system.
• Compared with an older and more restrictive factory catalyst, the high-flow design is intended to reduce resistance to exhaust-gas movement.
• This can help the engine breathe more efficiently while retaining a catalytic converter in the exhaust system.

Performance Benefits:
Fabspeed reports gains of approximately:

Wheel Horsepower: +2 WHP
Torque: +2 ft-lb
Weight Reduction: Approx. 9 lb / 4.1 kg

The primary performance benefit is reduced exhaust restriction and improved throttle response rather than a dramatic increase in peak horsepower.

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

Actual performance can vary depending on:

• Engine condition
• Engine specification
• Existing exhaust system
• Intake modifications
• Fuel and ignition condition
• Engine tuning
• Fuel quality
• Ambient conditions
• Testing equipment and procedure

Why Upgrading Matters:
The original catalytic converter does not necessarily need to have failed before a Sport Cat is installed.

The Fabspeed unit can also be selected as a performance exhaust upgrade.

Potential benefits include:

• 300-cell high-flow catalyst
• Reduced exhaust restriction
• Improved throttle response
• Slight horsepower and torque improvement
• Approx. 9 lb weight saving
• Sportier exhaust tone
• T304L stainless-steel construction
• Integrated O2 sensor bung
• Direct bolt-on installation
• No cutting or welding required

This makes the Sport Cat particularly relevant for owners who want a freer-flowing catalytic exhaust configuration rather than using a completely catless bypass pipe.

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

FSPOR911SC

The product you are viewing cross references to these numbers

Fabspeed Sport Muffler Bypass Exhaust System With Catalyst.

The Fabspeed Sport Muffler Bypass Exhaust System with Catalyst is a performance-focused exhaust upgrade designed for the 1976–1989 Porsche 911 Turbo / 930.

Fits:

• Porsche 911 1976-1977 3.0L Turbo (930)
• Porsche 911 1978-1989 3.3L Turbo (930)  

The system replaces the heavier and more restrictive factory muffler arrangement with a freer-flowing single-outlet muffler bypass system incorporating a high-flow HJS Sport Catalytic Converter.

Constructed from 14–16 gauge T304 stainless steel, the system uses large 3.0-inch / 76.5mm CNC mandrel-bent tubing to provide a smoother, less restrictive route for exhaust gases leaving the turbocharger.

A Deluxe Oval Style Tip in polished chrome is included, providing a distinctive finished appearance at the rear of the vehicle.

Fabspeed states that the system is designed to improve horsepower and torque while reducing weight compared with the bulky factory muffler system. Specific horsepower, torque and weight figures are currently listed by Fabspeed as TBD.

What This Product Does:
The exhaust system carries combustion gases away from the engine and turbocharger while controlling exhaust noise, flow and emissions.

On the Porsche 930's turbocharged engine, exhaust gases leaving the turbine must pass through the catalytic converter, muffler and associated pipework before exiting the vehicle.

The Fabspeed system replaces the conventional rear muffler with a more direct bypass arrangement, helping reduce restriction downstream of the turbocharger.

Its main functions and benefits include:

• Improving exhaust gas flow
• Reducing post-turbo exhaust restriction
• Eliminating the bulky factory muffler
• Supporting improved throttle response
• Supporting increased horsepower and torque
• Reducing rear exhaust-system weight
• Producing a louder and more aggressive turbocharged exhaust note
• Providing a high-flow catalytic converter
• Replacing ageing factory exhaust components
• Improving corrosion resistance through stainless-steel construction

Because the muffler is bypassed, the system provides a considerably more direct and performance-focused exhaust character than the standard arrangement.

Symptoms Of Wear Or Failure:
The original exhaust components on a Porsche 930 may now be several decades old. Repeated heating and cooling cycles, condensation, vibration and corrosion can gradually deteriorate mufflers, catalytic converters and pipework.

Common symptoms include:

• Rust or corrosion on the exhaust system
• Cracks around pipes, seams or welds
• Exhaust blowing or hissing noises
• Black soot around leaking connections
• Loose or damaged exhaust clamps
• Rattling from the muffler
• Metallic rattling from the catalytic converter
• Excessively loud or irregular exhaust noise
• Exhaust fumes around the rear of the vehicle
• Damaged or weakened mounting points
• Reduced throttle response
• Reduced engine performance
• Increased turbo lag
• Excessive exhaust restriction
• Sulphur-like or unusual exhaust smells
• Visible damage or deformation of exhaust components

Internal muffler components can also deteriorate and become loose, producing rattling or obstructing exhaust flow.

Why Replacement Matters:
A damaged or restrictive exhaust system can affect both performance and reliability.

Leaks can allow hot exhaust gases to escape before reaching the intended outlet. This may expose surrounding engine or body components to unnecessary heat and create excessive noise.

Corrosion can also weaken pipework and mounting points until sections of the exhaust become loose or fail.

A damaged catalytic converter can be particularly restrictive if the internal substrate begins to break down or collapse.

On a turbocharged Porsche 930, excessive restriction downstream of the turbocharger can work against efficient exhaust evacuation. This may contribute to:

• Slower turbo response
• Reduced throttle response
• Loss of engine performance
• Increased exhaust temperatures

Replacing deteriorated exhaust components restores a secure and unobstructed exhaust path.

For vehicles with a serviceable standard exhaust, fitting the Fabspeed system provides the additional benefits of reduced restriction, lower weight and a considerably more aggressive exhaust sound.

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.

FSPOR911TSCMBE

The product you are viewing cross references to these numbers

Intermediate Pipe replacement in stainless steel. Grey painted.



Fits:
Porsche 911 turbo 3.0ltr - 1975 to 1977
Porsche 911 turbo 3.3ltr - 1978 to 1989

Click 'Zoom in' for large parts diagram.
Diagram ref no 15

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

93011100304

The product you are viewing cross references to these numbers

Intermediate Pipe replacement in stainless steel. Grey painted.



Fits:
Porsche 930 3.0L Turbo 1975-77
Porsche 930 3.3L Turbo 1978-89
Porsche 964 Turbo 3.3L-3.6L 06/1991-07/1993

Please note:
This part will fit most of cars straight away but some may require alteration.
Porsche made a few different versions of the pipe over the years which all had a slightly different shape. (although Porsche used one number)
If this pipe is out you would need to loosen all the bolts on the exhaust system (Including the turbo) and mount the pipe into place afterwards.

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

93011100304

The product you are viewing cross references to these numbers

Intermediate Pipe replacement in stainless steel. Glass bead blasted finish.



Fits:
Porsche 930 3.0L Turbo 1975-77
Porsche 930 3.3L Turbo 1978-89
Porsche 964 Turbo 3.3L-3.6L 06/1991-07/1993

Please note:
This part will fit most of cars straight away but some may require alteration.
Porsche made a few different versions of the pipe over the years which all had a slightly different shape. (although Porsche used one number)
If this pipe is out you would need to loosen all the bolts on the exhaust system (Including the turbo) and mount the pipe into place afterwards.

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

93011100304SS

The product you are viewing cross references to these numbers