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Connecting line Genuine Porsche part 9A111301772
• This part is brand new and unused.
• Please verify that it is 100% suitable for your specific vehicle before purchase to ensure compatibility.
Before purchasing thoroughly check part to confirm compatibility.
- We are unable to provide fitting details for this product at this time. Please contact us for further information.

Direct replacement for the restrictive OEM headers, offering improved power and throttle response throughout the RPM range.
FEATURES:
• Fits: all Porsche 991 GT3 vehicles 2014+
• Includes German-imported HJS 200-Cell Tri-Metallic Sportcats
• Saves 2lbs from the rear of the vehicle
• CNC mandrel-bent 1pc primary header tubes
• High-velocity motorsports-style merge collector
• Constructed from T304 Stainless Steel
• All Fabspeed performance products are backed by the Fabspeed Lifetime Limited Warranty
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
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.
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Related, superseded, cross reference or alternative numbers for comparison.
FSPOR991GT3SHDR
The product you are viewing cross references to these numbers
- Porsche 991.1 GT3 3.8L (475Bhp) 2014-16

Direct replacement for the restrictive OEM headers, offering improved power and throttle response throughout the RPM range.
Why We Choose HJS Catalytic Converters:
HJS German imported catalytic converters are made from some of the highest grade material you can find in a catalytic converter. This yields high performance gains and longevity so it wont deteriorate over time like lower grade catalytic converters. These catalytic converters flow up to 93-95% of a straight pipe in most applications. The benefit is that you get the "straight pipe sound" while still being able to provide enough emissions scrubbing to prevent a check engine light.
FEATURES:
• Fits all Porsche 991.2 GT3 / GT3 RS vehicles 2017+
• Includes German-imported HJS 200-Cell Tri-Metallic Sportcats
• Saves 2 lbs from the rear of the vehicle
• CNC mandrel-bent 1pc primary header tubes
• High-velocity motorsports-style merge collector
• Constructed from T304 Stainless Steel
• All Fabspeed performance products are backed by the Fabspeed Lifetime Limited Warranty
DISCLAIMER: 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
INSTALLATION NOTE: To ensure proper header seal, after initial heat cycle, tighten all exhaust bolts to the OEM torque specs.
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.
FSPOR9912GT3SHDR
The product you are viewing cross references to these numbers
- Porsche 991.2 GT3 4.0L (500 Bhp) / GT3 RS 4.0L (520 Bhp) 2017-19
Fits:
Porsche 987.2 Boxster 2.9L 2009-12
Porsche 987C.2 Cayman 2.9L 2009-12
Click 'Zoom in' for large parts diagram.
Diagram ref no 13
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
9A111301802
The product you are viewing cross references to these numbers
- Porsche Boxster 987 MKII 2.9L 2009-2012
- Porsche Cayman 2.9L 987C MKII 2009-12

Fits:
Porsche 987.2 Boxster 2.9L 2009-12
Porsche 987C.2 Cayman 2.9L 2009-12
Click 'Zoom in' for large parts diagram.
Diagram ref no 12
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
9A111301702
The product you are viewing cross references to these numbers
- Porsche Boxster 987 MKII 2.9L 2009-2012
- Porsche Cayman 2.9L 987C MKII 2009-12
Fits:
Porsche 911 (991.2) GT3 RS 2020
Evolution Header Set converts the slip-on system into a full system designed to give noticeably increased power at higher revs. Handcrafted titanium headers incorporate 100 cpsi sports catalytic convertors and side mufflers—all designed to increase power and torque—the Evolution Header Set utilizes integrated catalytic convertors and the functionality of the exhaust valves to deliver an out-and-out attack on the senses. With the valves in the open position, it delivers a sportier and hard-hitting sound, but also has the option of a lower sound level when the valves are closed, perfect for use in more everyday locations. Offering an increased weight savings in the area behind the engine and the rear axle, the reduction will enhance the handling and improve performance.
When installing Akrapovič aftermarket optional link pipes with sports catalytic converters or without catalytic converters, which are developed for use on closed tracks only, remapping the ECU is mandatory. When installing Akrapovič aftermarket exhaust system that was developed for use on closed tracks, we recommend remapping the ECU in order to prevent potential »check engine light« warning signals.
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.
E-PO
The product you are viewing cross references to these numbers
- Porsche 991.2 GT3 4.0L (500 Bhp) / GT3 RS 4.0L (520 Bhp) 2017-19
Fits:
Porsche 911 (991.2) GT3 RS
Evolution Race Header Set converts the slip-on system into a full system, built for the track and gives the Porsche GT3 the extra performance to match. Handcrafted titanium headers incorporate 100 cpsi sports catalytic convertors and titanium flanges—cast in Akrapovič's own foundry. The system offers a perfect power curve right from 3,000 rpm to the very top of the power band, designed to continually increase performance as the revs rise. Along with improved torque and the maximum weight savings to enhance handling, adding the Evolution Race Header (Set) will have the car performing like a true cup racer—with a deep, loud, and powerful Akrapovič racing sound to match its performance.
When installing Akrapovič aftermarket optional link pipes with sports catalytic converters or without catalytic converters, which are developed for use on closed tracks only, remapping the ECU is mandatory. When installing Akrapovič aftermarket exhaust system that was developed for use on closed tracks, we recommend remapping the ECU in order to prevent potential »check engine light« warning signals.
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.
E-PO
The product you are viewing cross references to these numbers
- Porsche 991.2 GT3 4.0L (500 Bhp) / GT3 RS 4.0L (520 Bhp) 2017-19

High quality T304 Stainless steel equal length primary tubes. C.N.C. mandrel bent.
Designed for maximum flow and no restriction.
Reduced back pressure and better scavenging. More torque and horsepower across the RPM band.
Fits:
Porsche 991 GT3 3.8L 476 Bhp 2013 - 2017 (A175 engine)
Porsche 991 GT3 RS 4.0L 507 Bhp 2013 - 2017 (A175 engine)
Porsche 911 R 4.0L 507Bhp 2014-2017 (A176 engine)
Please note: This will not fit cars:
- with engine codes DNSA / DNSB - 4.0L with 520 Bhp
- released after 06/2017 with engine codes DGG / DGGA / DGGB
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.
3606309105
The product you are viewing cross references to these numbers
- Porsche 991.1 R 4.0L (500 Bhp) 2016
- Porsche 991.1 GT3 3.8L (475Bhp) 2014-16
- Porsche 991.1 GT3 RS 4.0L (500Bhp) 2015-16
- Porsche 991.2 GT3 4.0L (500 Bhp) / GT3 RS 4.0L (520 Bhp) 2017-19

High quality T304 Stainless steel equal length primary tubes. C.N.C. mandrel bent.
Designed for maximum flow and no restriction.
Reduced back pressure and better scavenging. More torque and horsepower across the RPM band.
Fits:
Porsche 991.2 GT3 4.0L 500 Bhp 2017-2020 (DGG / DGGA engine)
Porsche 991.2 GT3 RS 4.0L 520 Bhp 2017 - 2020 (DGGB engine)
Please note: This will not fit cars:
- with engine codes DNSA / DNSB - 4.0L with 520 Bhp
Please note: These race cats will make your car sound significantly louder than with stock cats. Race track and off road use only.
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.
3606309106
The product you are viewing cross references to these numbers
- Porsche 991.1 R 4.0L (500 Bhp) 2016
- Porsche 991.2 GT3 4.0L (500 Bhp) / GT3 RS 4.0L (520 Bhp) 2017-19
Condition: Used, Not tested.
Used parts do not have a warranty or guarantee, all parts are sold as seen, these parts should be used as part of a restoration project and will require checking and restoration before fitting. We can not take back or refund for used parts.
Porsche 991 GT3 3.8L (engine code: A175) 2013-17
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
9A111302190U
The product you are viewing cross references to these numbers
- Porsche 991.1 GT3 3.8L (475Bhp) 2014-16
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Saturday: Closed
Sunday: Closed