Fabspeed Cat Bypass RACE Pipes Helical Valves PSE for Porsche 991.2 GT2 RS 2018-2020

VENDOR: Fabspeed


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Why We Choose HJS Catalytic Converters:

Replace the restrictive OEM  GT2RS ceramic 700 cell catalytic converters with Helical U.K.  Valve-tRonic straight pipes for racing Competition only.

Fabspeed catbypass pipes straight pipes bolt-up to stock GT2 RS titanium center muffler for maximum aggressive sports car sound and turbo whistling due to NO catalytic converters. You will get a Check Engine Light.

Porsche used a 60mm 2.375” exhaust valve for the bypass to the exhaust tip on each exhaust bank. Fabspeed Motorsport went much larger  74mm 2.92" Helical Limited Aerospace United Kingdom exhaust valves for enhanced sports car sound and power versus small 60mm 2.375" stock valves. Helical U.K. exhaust valves are the same OEM bulletproof quality as used by Porsche on the GT3RS, Ferrari 488 pista, F12, Mclaren Senna, and Lamborghini supercars. Fabspeed engineers went with larger ultra heat resistant premium exhaust valves for much more exhaust flow and power potential than the small stock exhaust valve while not compromising reliability. 

The above Fabspeed Motorsport GT2 RS Catbypass/straight pipe system is the World’s very best! This is the result of design, engineering and the very best imported components. Based on over 30+ years of Motorsport design and quality. 

For RACING and COMPETITION usage exclusively.  


Additional Information:

HP (whp) TQ (ft/lbs) WT (lbs)
TBD 20 -6



  • Fits all Porsche 991.2 GT2RS, Weissach and Manthey vehicles worldwide (2018+)

  • Constructed from high-quality 14-16 gauge, C.N.C. mandrel bent T304 Stainless Steel- 100% built in house.

  • Check Engine Light will appear without ECU tune

  • Cat Bypass Pipes with ECU Tune adds an insane 113 WHP at 6400 RPM and 125 FT/LBS of torque at 3250 RPM

  • Modular replacement for the OEM catalytic converters

  • OEM Tier 1 quality valves from Helical Aerospace ENGLAND

  • 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.

  • Not CARB certified - for off-road and track use only!! Not for street driven cars. 

  • Simple 1 hour installation. There are only 4 clamps to remove and replace stock OEM Porsche cats and replace with Fabspeed.

  • EASY and EASY OFF for going to the race track and then back onto the street. So sweet so simple dual use retains PSE.

  • Sounds solution warranty no applicable for competition system.

  • Fabspeed the Worlds Very 1st company with over 25 years of street and motorsports history to perfect GT2RS systems including the 2011 GT2RS.

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

Vehicle Fitment:

991.2 GT2 RS 911

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 contains a High-Flow Sport Catalytic Converter solely intended for track and race cars as it is 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.