Manifold / Headers

9m Equal length exhaust manifold with catalytic converter. 
Sold as a pair - left and right

Fits:
Porsche 981 Boxster - 2012 to 2016
Porsche 981 Boxster S - 2012 to 2016

Porsche 981 Boxster GTS -  2012 to 2016
Porsche 981 Boxster Spyder - 2016
Porsche 981 Cayman - 2013 to 2016
Porsche 981 Cayman S - 2013 to 2016
Porsche 981 Cayman GTS - 2013 to 2016
Porsche 981 Cayman GT4 - 2016

Made from SS304L lightweight stainless steel these exhaust manifolds offer reduced back pressure with higher flow

• Performance gains of 20hp minimum and 20nm
• Improved throttle response
• Improved exhaust note with no drone, resonation or vibration
• Direct fit no remap required but recommended
• No CEL
• Heat shielded to reduce radiant heat and speeds up exhaust gas velocity

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9M81113211

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These titanium components are resistant to rust and corrosion, which can be a common issue with traditional steel studs and nuts. This corrosion resistance ensures that the studs and nuts maintain their integrity, allowing for easy removal and installation when necessary. They are the perfect upgrade for Porsche enthusiasts who demand the ease of access to vehicle's exhaust system. 

• Ultra-high-performance product
• Use of Titanium Ti6Al4V technology

Contains 18 x Studs (38mm), Nuts & Washers

Fits:
Porsche 996 Turbo / GT3 / GT2
Porsche 997 Turbo / GT3 / GT2
Porsche 997.2 ALL
Porsche 991 ALL
Porsche 992 ALL
Porsche 987 2009-12
Porsche 981
Porsche 718 GT4

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TITANSTUDS18

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Exhaust manifold bolts M8x21. Made out of Titanium
Set of 18 pcs

Titanium is a highly corrosion-resistant material, which is particularly important in exhaust systems due to the exposure to extreme heat and moisture. The corrosion resistance of titanium bolts ensures longevity and reduces the risk of premature failure, ultimately saving the owner from costly repairs.

Fits:
Porsche 987.2 Boxster 2009-2012
Porsche 987C.2 Cayman 2009-2012
Porsche 997.2 Carrera 2009-2012
Porsche 981 Boxster 2012-2016
Porsche 981C Cayman 2014-2016
Porsche 991 MKI 2012-2016
Porsche Cayman GT4 2016

Click 'Zoom in' for large parts diagram.

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TITANTORXSHORT18

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Fabspeed Exhaust Race Headers.

  

Fabspeed's Race Headers for the Porsche Cayman GT4 will get you out of the corner fast and maximize your pulling power on the straights! Designed for track and off-road use, these cat less long tube headers provide maximum exhaust flow from the engine cylinders straight into the exhaust system.

Get out of the corner fast and maximize your pulling power on the straights! Designed for track and off-road use, these cat less long tube headers provide maximum exhaust flow from the engine cylinders straight into the exhaust system.

Fabspeed's Race Headers for the Porsche Cayman GT4 are built to optimize the engine's exhaust flow for maximum performance. Our precision-engineered headers add up to 18 horsepower at the wheels and 15 ft/lbs of torque at 6300 RPM, increasing the already impressive performance of the Porsche GT4. Down low these Race Headers give you a kick in the pants, adding 27 whp and 38 ft/lbs of torque at 3700 RPM.

With Race Headers from Fabspeed, your Cayman GT4 will strike fear into the hearts of 911 owners at the track. Set yourself apart from the factory-equipped crowd with these unbeatable performance upgrades and watch your Porsche's power - and your race results - climb.

FEATURES:
• Fits all Porsche 981 Cayman GT4 / Boxster Spyder vehicles (2015+)
• Adds 27 whp and 38 ft-lbs of torque at 3700RPM and 18 whp and 15 ft/lbs at 6300 RPM
• Saves 10 lbs from the rear of the vehicle compared to the full OEM exhaust system
• Constructed from equal-length T304 stainless steel C.N.C. mandrel-bent tubing for improved torque and equalized engine pulsing
• More power and torque across the RPM band and dramatically improved sports car sound
• Direct replacement for the OEM headers with no cutting or welding required
• All Fabspeed performance products are backed by the Fabspeed Lifetime Limited Warranty

PLEASE 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. In most vehicles, removing the catalytic converters may trigger a Check Engine Light. HOWEVER, in over 200 miles of testing, our development vehicle did NOT trigger a CEL with these Race Headers installed.

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.

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FSPOR981GT4LTRHDR

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Fabspeed Exhaust Sport Headers.

Low-end power and sound that you can enjoy every day! The perfect complement to either the factory exhaust system or Fabspeed's performance exhaust systems, these high-flow headers are designed around HJS catalytic converters, making them the best upgrade for more enjoyable street driving and emissions compliance.

Designed with noticeable street performance in mind, these Sport Headers provide an additional 26 whp and 39 ft/lbs of torque at 3600 RPM. This translates to significantly better acceleration and throttle response when powering away from a stop light or merging onto your favorite highway. Thanks to the world-class performance of the HJS catalytic converter cores, your GT4 stays emissions-compliant in most regions and will not throw a Check Engine Light.

In addition to the performance gains, Fabspeed's GT4 Sport Headers also add great character to the exhaust note by improving the overall volume and tone.

FEATURES:
• Fits all Porsche 981 Cayman GT4 / Boxster Spyder vehicles (2015+)
• Includes German-imported 200-cell HJS Sport • Catalytic Converters for maximum performance and reliability
• Adds 26 whp and 39 ft-lbs of torque at 3600RPM, providing significantly better performance during street acceleration
• Constructed from equal-length T304 stainless steel C.N.C. mandrel-bent tubing for improved torque and equalized engine pulsing
• More power and torque across the RPM band and dramatically improved exhaust sound
• Direct replacement for the OEM headers with no cutting or welding required
• All Fabspeed performance products are backed by the Fabspeed Lifetime Limited Warranty

PLEASE NOTE: Fabspeed's 200-cell high-flow catalytic converters are not C.A.R.B. certified and are for Off-Road Use ONLY in the state of California. 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.

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.

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FSPOR981GT4SHDR

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Screw plug for lambda hole, M18x1.5 mm.

Fits:
Porsche 924S 2.5L 1987-88 (Engine M44.09/M44.10)
Porsche 944 2.5L 1987-90 (Engine M44.09/M44.10)
Porsche 944 Turbo 2.5L 1985-91
Porsche 944S 2.5L 1986-88 (Engine M44.40)
Porsche 944 2.7L 1988-89
Porsche 944 3.0L 1988-91
Porsche 996 GT3 3.6L 1999-05
Porsche 968 3.0L 1991-95
Porsche 986 Boxster 2.5L 1996-99 (Engine M96.20)
Porsche 986 Boxster S 2.7L-3.2L 1999-04
Porsche 993 3.6L-3.8L 1993-97
Porsche 997 3.6L 2004-08 (Engine M95.05)
Porsche 997 3.8L 2004-08 (Engine M97.01)

Click 'Zoom in' for large parts diagram.
Diagram ref no 20

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90021901500

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SOUL Competition Headers.

The SOUL Performance Competition Headers are premium aftermarket performance exhaust manifolds designed specifically for the Porsche 981 Cayman GT4, Boxster Spyder and GT4 Clubsport models manufactured between 2015 and 2016.

Fits:

• Porsche Boxster 981 Spyder 3.8L 2016
• Porsche Cayman GT4 3.8L 2015-16  

Developed for the naturally aspirated 3.8-litre flat-six engine, these competition-specification headers replace the original Porsche exhaust manifold and catalytic converter assemblies with a freer-flowing stainless steel exhaust arrangement.

The factory exhaust system is engineered to balance engine performance, emissions control, noise restrictions and everyday usability. Although highly capable, the original exhaust manifolds and catalytic converters introduce resistance into the exhaust path.

SOUL Performance's Competition Headers are designed to reduce this restriction and improve the movement of exhaust gases away from the cylinder heads.

Each header incorporates 2-inch primary runners, smooth-radius tubing, port-matched mounting flanges and optimised collectors to help improve exhaust gas flow.

The long-runner design is engineered to complement the characteristics of Porsche's high-revving 3.8-litre engine, supporting improved engine breathing and throttle response.

Manufactured from T304L stainless steel, the headers offer corrosion resistance, strength and durability under demanding exhaust operating temperatures.

Unlike SOUL Performance's separately available Long Tube Street Headers, the Competition Headers do not incorporate catalytic converters.

This catalyst-free construction reduces exhaust restriction and produces a more pronounced exhaust note, making the product particularly suitable for dedicated off-road and motorsport applications.

SOUL Performance reports third-party dynamometer testing demonstrating measurable performance improvements when these headers are combined with suitable ECU tuning.

The headers are designed as a direct bolt-on replacement for the compatible factory manifold assemblies. Each set is checked in an installation fixture before dispatch, and fitting instructions are supplied.

The Competition Headers can also form part of the complete SOUL Performance Competition Package when combined with the manufacturer's compatible valved rear exhaust system.

For Porsche enthusiasts seeking increased exhaust flow, improved throttle response and a more aggressive flat-six soundtrack, the SOUL Performance Competition Headers provide a substantial upgrade to the original exhaust manifold arrangement.

What This Product Does:
Exhaust headers collect combustion gases as they leave the engine's cylinder heads and direct them into the remainder of the exhaust system.

On the Porsche 981 GT4 and Boxster Spyder, exhaust gases leave the naturally aspirated 3.8L flat-six engine through the exhaust ports before passing into the original exhaust manifolds and catalytic converter assemblies.

The SOUL Performance Competition Headers replace these original assemblies with stainless steel performance headers.

Their primary purpose is to improve the efficiency with which exhaust gases leave the engine.

The main functions include:

• Collecting exhaust gases: Direct spent combustion gases away from the cylinder heads.
• Improving exhaust flow: Provide smoother internal gas passages to reduce unnecessary restriction.
• Supporting exhaust scavenging: Use runner length and collector geometry to encourage efficient exhaust pulse movement.
• Reducing exhaust backpressure: Remove restrictions associated with the original catalytic converter assemblies.
• Improving engine responsiveness: Support sharper throttle response under acceleration.
• Increasing performance potential: Help the engine breathe more efficiently, particularly at higher engine speeds.
• Enhancing exhaust sound: Produce a louder, more distinctive naturally aspirated flat-six soundtrack.
• Supporting high-RPM operation: Use runner dimensions selected for the characteristics of the 3.8L engine.
• Reducing component weight: Offer weight-saving potential compared with the original exhaust assemblies.
• Supporting performance tuning: Complement suitable ECU calibration and other compatible exhaust upgrades.
• Maintaining downstream exhaust connection: Fit to the appropriate original or compatible aftermarket rear exhaust arrangement.
• Providing durability: Use stainless steel components designed for high-temperature exhaust conditions.

Why Replacement Matters:
The SOUL Performance Competition Headers are designed for Porsche owners seeking a more performance-focused exhaust configuration.

Their principal advantages are improved exhaust flow, increased performance potential and enhanced engine sound.

1. Improved Exhaust Gas Flow

The headers use smooth-radius primary tubing, port-matched flanges and optimised collectors.

These design features are intended to reduce turbulence and help exhaust gases travel efficiently away from the cylinder heads.

2. Reduced Exhaust Restriction

Removing the original catalytic converters eliminates a significant source of resistance in the exhaust path.

This creates a freer-flowing arrangement intended to support the high-revving characteristics of the 3.8L flat-six engine.

The corresponding loss of emissions control means the product is restricted to suitable off-road applications.

3. Increased Horsepower Potential

SOUL Performance reports testing carried out using a Dyno Dynamics dynamometer.

The manufacturer states that:

Approximately 40 wheel horsepower was gained in the tested configuration when combined with ECU tuning. Approximately 20 wheel horsepower of additional improvement was attributed to installing the Competition Headers after the tune had been applied.

These figures relate to the manufacturer's published test configuration.

Actual results depend on the vehicle, ECU calibration, engine condition and other installed modifications.

No specific horsepower gain is guaranteed for an otherwise standard vehicle.

4. Sharper Throttle Response

A freer-flowing exhaust can improve the engine's response to accelerator input.

This may be particularly noticeable when accelerating through the middle and upper sections of the engine's rev range.

5. More Aggressive Flat-Six Sound

The Competition Headers change the exhaust flow path and remove the sound attenuation associated with the factory catalytic converters.

This can produce a louder, more immediate and more pronounced exhaust note.

The final sound will also depend on the rear exhaust system installed.

6. Stainless Steel Construction

The headers are fabricated from T304L stainless steel.

This material provides corrosion resistance and durability in demanding, high-temperature exhaust environments.

7. Weight-Saving Potential

SOUL Performance identifies reduced weight as a benefit of the Competition Headers compared with the original components.

The precise total saving should be confirmed for the vehicle's original exhaust specification rather than assumed from other header products.

8. Direct Bolt-On Installation

The headers are designed to replace the original assemblies without bespoke exhaust fabrication on a compatible vehicle.

SOUL Performance tests each set in a fixture to check fitment and supplies installation instructions.

9. Compatibility with Additional Performance Upgrades

These headers may be combined with suitable rear exhaust systems and an appropriate motorsport ECU calibration.

They are also used as part of SOUL Performance's dedicated Competition Package.

10. Manufacturer Warranty

SOUL Performance provides a lifetime warranty for its Competition Headers, subject to the manufacturer's published warranty conditions.

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POR.GT4.COH

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SOUL Long Tube Street Headers.

The SOUL Performance Long Tube Street Headers are high-performance aftermarket exhaust manifolds developed specifically for the Porsche 981 Cayman GT4, Boxster Spyder and GT4 Clubsport models manufactured between 2015 and 2016.

Fits:

• Porsche Boxster 981 Spyder 3.8L 2016
• Porsche Cayman GT4 3.8L 2015-16  

Designed for the naturally aspirated 3.8L flat-six engine, these headers replace the original exhaust manifold and catalytic converter assemblies with a carefully engineered long-tube exhaust system incorporating high-flow catalytic converters.

The original Porsche exhaust system is designed to balance performance, emissions, noise restrictions and everyday usability.

SOUL Performance's long-tube headers are designed to improve exhaust flow and engine response by using longer, smoother exhaust runners and optimised collectors.

Each header assembly features 2-inch primary runners, smooth-radius tubing and port-matched mounting flanges to help exhaust gases flow efficiently from the cylinder heads.

The headers are constructed from T304L stainless steel, providing excellent corrosion resistance and durability under demanding exhaust operating conditions.

High-flow catalytic converters are incorporated into the system, allowing improved exhaust flow while retaining a catalytic treatment stage rather than adopting a fully decatted design.

The long-tube configuration is particularly beneficial on a high-revving naturally aspirated engine because exhaust gas velocity, pulse timing and collector design influence engine breathing and the delivery of power across the rev range.

SOUL Performance has developed this product to complement the characteristics of the Porsche 981 GT4 and Spyder's 3.8L engine.

The result is a performance-focused exhaust upgrade intended to improve throttle response, enhance high-RPM engine performance and produce a more pronounced flat-six exhaust note.

Unlike a complete exhaust replacement, these headers replace the exhaust manifold and catalyst sections while allowing the compatible downstream exhaust to remain in place.

The product is manufactured using precision fabrication methods and is checked in a dedicated fixture to maintain accurate installation fitment.

SOUL Performance supplies installation instructions and offers a manufacturer's lifetime warranty, subject to its published conditions.

Ideal for Porsche enthusiasts seeking improved engine response, stronger performance and a more engaging exhaust character, these Long Tube Street Headers provide a substantial upgrade to the factory exhaust manifold arrangement.

What This Product Does:
The exhaust headers collect combustion gases leaving the engine's cylinder heads and direct them into the remainder of the exhaust system.

In a naturally aspirated flat-six engine, the design of the exhaust runners and collectors can influence how efficiently exhaust gases leave the cylinders.

Reducing unnecessary restrictions and improving exhaust pulse behaviour can help the engine expel spent gases and prepare for the next intake and combustion cycle.

The SOUL Performance Long Tube Street Headers are designed to improve this process through their runner length, primary diameter and collector geometry.

Their main functions include:

• Collecting exhaust gases: Direct exhaust gases away from the engine's cylinder heads.
• Improving exhaust flow: Use smooth-radius tubing and optimised collectors to reduce unnecessary restrictions.
• Supporting exhaust scavenging: Help exhaust pulses travel through the runners in a more efficient manner.
• Improving throttle response: Support more responsive engine behaviour under acceleration.
• Increasing performance potential: Enable improved engine breathing, particularly at higher engine speeds.
• Enhancing exhaust sound: Produce a stronger, more distinctive flat-six exhaust character.
• Maintaining catalytic treatment: Incorporate high-flow catalytic converters in the exhaust path.
• Supporting high-RPM operation: Use runner and collector dimensions selected for the 3.8L GT4 engine.
• Maintaining downstream exhaust compatibility: Connect to the appropriate existing rear exhaust system.
• Providing durable exhaust construction: Use corrosion-resistant stainless steel designed for elevated temperatures.
• Supporting performance tuning: Provide improved exhaust flow that may complement a correctly developed ECU calibration.
• Enhancing driving engagement: Deliver a more pronounced engine response and soundtrack.
  
  

Why Upgrading Matters:
Replacing the original exhaust manifold and catalyst assemblies with SOUL Performance Long Tube Street Headers is primarily a performance-focused modification.

The upgrade is intended to improve exhaust efficiency, increase engine responsiveness and enhance the naturally aspirated Porsche flat-six soundtrack.

Improved Exhaust Flow

• The long-tube runners, smooth-radius bends and optimised collectors are designed to improve the movement of exhaust gases away from the cylinder heads.
• This helps reduce unwanted restrictions within the header assembly and supports more efficient engine breathing.

Increased Performance Potential

• SOUL Performance developed these headers specifically for the 3.8L engine used in the 981 Cayman GT4 and Boxster Spyder.
• The manufacturer reports independent Dyno Dynamics testing showing approximately 30 whp of improvement in a tuned configuration, including 12 whp of additional gain from the headers when tested after tuning.
• These results reflect the particular test vehicle and configuration. Individual results will vary.

Sharper Throttle Response

• Improved exhaust flow can contribute to more responsive engine behaviour, particularly when accelerating through the middle and upper engine speed ranges.

Enhanced Flat-Six Exhaust Sound

• The header design changes how exhaust gases travel through the system.
• This can produce a fuller, more pronounced and more sporting exhaust note.
• The final sound depends on whether the vehicle uses the original Porsche rear exhaust or another compatible aftermarket system.

High-Flow Catalytic Converter Design

• The integrated catalytic converters allow a performance-focused exhaust arrangement without removing the catalytic treatment stage entirely.
• Nevertheless, the manufacturer does not certify the product for all emissions-controlled road applications.

Stainless Steel Durability

• T304L stainless steel offers corrosion resistance and durability under repeated heating and cooling cycles.

Factory-Style Installation

• SOUL Performance designs these headers as a direct bolt-on replacement for the corresponding original exhaust manifold arrangement.
• No bespoke exhaust fabrication is advertised for a standard compatible installation, although access and removal of corroded hardware can make the work demanding.

Long-Term Performance Upgrade

• For Porsche owners seeking greater performance and a more distinctive driving experience, these headers offer an upgrade to a major part of the engine's exhaust system.

The product may also complement suitable ECU tuning and other performance exhaust modifications.

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POR.GT4.STH

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High performance stud + nut kits for the exhaust manifold to cylinder head for Porsche. Using titanium and Inconel alloy studs, aerospace lock nuts, and a well-thought and balanced combination of metals and plating/coatings, our fasteners will perform better than the traditional fastener. They will never oxidize, and hence will unscrew easily when required.

Novel ultra-high-performance product
• Use of Titanium Ti6Al4V technology
• Extreme perceived quality

Contains 18 x Studs, Nuts & Washers

Fits:
Porsche 996 Turbo / GT3 / GT2
Porsche 997 Turbo / GT3 / GT2
Porsche 997.2 ALL
Porsche 991 ALL
Porsche 992 ALL
Porsche 987 2009-12
Porsche 981
Porsche 718 GT4

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SL-TI-18

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