Fabspeed Center Muffler Bypass X-Pipe. Porsche 991.2 GT2 RS (2018+)  ›  FSPOR9912GT2RSCMX

The Fabspeed Center Muffler Bypass X-Pipe is a high-performance exhaust upgrade developed specifically for the Porsche 911 991.2 GT2 RS from 2018 onward, including Weissach and Manthey MR-equipped cars.

Fits:

• Porsche 991.2 GT2 RS 3.8L PDK (700 bhp) 2018-19

Designed to replace the factory titanium centre muffler, the system provides a freer-flowing exhaust path while retaining the vehicle's original catalytic converters.

At the centre of the system is Fabspeed's investment-cast X-pipe. The crossover allows exhaust gases from the two sides of the engine to merge through a carefully shaped central opening, helping reduce restriction, balance exhaust flow and produce a stronger, more exotic exhaust note.

The system is manufactured from 14–16 gauge T304 stainless steel with larger-diameter CNC mandrel-bent tubing. It provides a durable alternative to the original titanium centre muffler while increasing exhaust sound and supporting improved throttle response and performance.

Fabspeed currently lists a +20 HP performance gain for this product. Actual gains can vary according to vehicle condition, fuel, environmental conditions and other modifications.

What This Product Does:
The Fabspeed X-pipe replaces the original centre muffler in the rear exhaust system.

It is designed to:

• Reduce restriction through the centre exhaust section.
• Improve exhaust gas flow.
• Replace the factory titanium centre muffler.
• Increase exhaust volume.
• Produce a more dynamic GT2 RS exhaust note.
• Improve throttle response.
• Support increased engine performance.
• Retain the original catalytic converters.
• Maintain a catalyst-equipped exhaust configuration.
• Provide a durable stainless-steel replacement for the factory centre muffler.
• Allow straightforward installation and removal using the existing clamped exhaust arrangement.

• Metallic rattling.
• Exhaust blowing noises.
• Cracks around welds.
• Visible exhaust leakage.
• Soot around damaged joints.
• Increased exhaust noise.
• Muffler casing damage.
• Loose internal components.
• Exhaust vibration.
• Exhaust hanging incorrectly.
• Damaged inlet or outlet connections.
• Exhaust contacting surrounding components.
• Heat-related structural deterioration.

A damaged muffler should be inspected before continued high-load or track use.

Why Replacement Matters:
Replacing a damaged or restrictive centre muffler section helps restore:

• Correct exhaust sealing.
• Safe routing of hot exhaust gases.
• Proper exhaust alignment.
• Structural integrity.
• Consistent exhaust flow.
• Reliable mounting.

Upgrading to the Fabspeed X-pipe additionally provides:

• Increased exhaust sound.
• Reduced centre-section restriction.
• Improved throttle response.
• A more performance-focused exhaust character.
• Retention of the factory catalytic converters.