Fabspeed Porsche GT4RS Titanium Non-Valved Cat-Back System

Porsche 718 GT4 RS / Spyder RS Titanium Ultralight Sport Exhaust

The Ultimate Lightweight Titanium Exhaust for the Porsche 718 GT4 RS & Spyder RS cars worldwide.

Unlock the full character of Porsche's 9,000 RPM flat-six with Fabspeed Motorsport's Titanium Ultralight non-valved Exhaust. Designed for GT4RS, RS SPYDER enthusiasts who demand maximum performance, dramatic weight reduction, and an unmistakable motorsport soundtrack, this system transforms the GT4 RS and Spyder RS into the car Porsche always intended.

Developed entirely in-house using over three decades of Porsche exhaust engineering experience, our design process began with a complete 3D laser scan of the factory exhaust. From there, our engineering team created a full CAD model in SolidWorks, allowing every bend, bracket, and mounting location to perfectly replicate OEM fitment while dramatically improving airflow and reducing weight.

Unlike conventional rear muffler designs, the Fabspeed Titanium Ultralight Race Exhaust utilizes our proprietary investment-cast titanium X-Pipe, engineered to efficiently merge both cylinder banks for improved exhaust scavenging, smoother power delivery, and the signature high-frequency exhaust note that naturally aspirated Porsche engines are famous for. ABSOLUTELY NO REDICULOUS PIE-CUTs multiple welded pieces of Titanium . PIE CUTs are 110% the worst possible diuplay of POOR craftsmanship and are all HAZs- heat affected zones in the welding trade that will 100% break and fail. Dont get sucked into Alibaba pie-cut multiple lobster tail welds and "ASSUME" thats craftmanship.

Constructed entirely from premium aerospace-grade titanium, CNC 1 piece mandrel bent like aircraft miltary tubing should be , the minimalist race-inspired design dramatically reduces rear vehicle weight while offering exceptional heat resistance, corrosion resistance, and long-term durability under even the most demanding track conditions.

Sound:

The GT4 RS possesses one of Porsche's greatest naturally aspirated engines, but the factory exhaust system mutes much of its true character.

The Fabspeed Titanium Ultralight Race Exhaust unleashes the unmistakable high-pitched wail of the 4.0-liter flat-six by allowing the engine to breathe freely through our optimized X-Pipe architecture. The result is a sharper, smoother, more exotic exhaust note that continues to build all the way to the 9,000 RPM redline.

Inspired by the legendary Porsche RSR race cars, the sound is crisp, aggressive, and incredibly rewarding—without the harsh metallic resonance commonly found in many lightweight race exhausts.

Performance:

The optimized X-Pipe architecture significantly reduces exhaust restriction while improving scavenging between cylinder banks, allowing the engine to produce stronger mid-range torque and increased horsepower throughout the powerband.

The lightweight titanium construction also removes a substantial amount of weight from the rear of the vehicle, improving overall handling response, braking performance, and weight distribution while allowing the engine to rev more freely.

Engineering Highlights:

• Proprietary investment-cast titanium X-Pipe maximizes exhaust scavenging and flow.
• Precision engineered using OEM 3D laser scans for perfect bolt-on fitment.
• Aerospace-grade titanium construction provides exceptional strength while dramatically reducing weight.
• Optimized tubing diameters maintain exhaust velocity for improved performance and superior acoustic quality.
• Race-inspired minimalist architecture minimizes restriction while maximizing durability.
• Developed through extensive dyno validation and real-world track testing.

Features:

• Fits all Porsche 718 GT4 RS and Spyder RS models worldwide.
• Ultra-lightweight aerospace-grade titanium construction.
• 100% Cat-Back 50 state emissions legal and emission LEGAL worldwide
• No affect on Porsche warranty- simple catback bolt-on installation.
• Significant weight reduction compared to the factory rear exhaust system.
• Dyno-developed high-flow design for measurable horsepower and torque gains.
• Proprietary investment-cast titanium X-Pipe for superior exhaust scavenging.
• Produces an exhilarating RSR-inspired high-frequency exhaust note.
• Precision laser-scanned and CAD designed for OEM-quality fitment.
• Compatible with factory headers and over-axle pipes.
• No Check Engine Light when installed with OEM exhaust components.
• Simple direct bolt-on installation with no cutting or welding required.
• Designed and manufactured in-house by Fabspeed Motorsport in Fort Washington, Pennsylvania.
• CAN BE RETROFITTED TO ANY AND ALL PORSCHE GT4/SPYDER 4.0L cars with adapter inlet pipes INQUIRE!