Fabspeed Center Muffler Bypass Kit – Compatible with Porsche 991 GT3 & GT3 RS (2014–2019)

Description

Replace the failure-prone stock rear muffler on your Porsche 991 GT3 or GT3 RS with Fabspeed’s Center Muffler Bypass Pipe. This high-flow stainless steel unit improves exhaust scavenging, sheds approximately 10 lbs from the rear, and delivers a richer, more aggressive exhaust tone while retaining the factory valve functionality for controlled sound levels.

Fitment Notes

• Fits all Porsche 991 GT3 / GT3 RS models from 2014-2019. 

• Designed to work with factory headers, catalytic converters, and side mufflers. 

• Retains the factory valve system and Sport Mode control button when used with OEM side mufflers.

• Direct bolt-on installation replacing the center muffler section; no cutting required.

Included

• Center bypass pipe assembly in T304 stainless steel

• Choice of 4″ Deluxe dual style tips (finish options available) included. 

• All necessary mounting hardware and gaskets.

• Detailed installation instructions.

Product Specs

• Construction: 14-16 gauge T304 stainless steel.

• Weight reduction: Approx. 10 lbs (4.6 kg) removed from the rear of the vehicle. 

• Design: “Talk-pipe” blending right and left cylinder banks for smoother, more unified exhaust tone. 

• Finish options: Multiple tip finishes available (polished stainless, Carbon Fiber, brushed, etc.). 

Product Features

• Improved Flow & Response: Replaces the restrictive factory muffler with a freer-flowing design, improving throttle response and exhaust character.

• Weight Savings at the Rear: By dropping ~10 lbs from the rear, it contributes to better vehicle dynamics and rear-end responsiveness.

• Aggressive Yet Manageable Sound: Retains factory valve functionality so you can maintain everyday civility or unleash a sportier tone when desired.

• High-Quality Construction: Built from premium T304 stainless, TIG-welded and designed for long-term durability.

• Seamless Integration: Maintains compatibility with OEM exhaust components and retains the Sport mode button functionality.

• Lifetime Warranty: Purchase confidence with Fabspeed’s lifetime warranty backing.

Explore more from our collection.