Porsche Long Tube Header System For Porsche 718 Cayman GT4 RS (2023-2025) Models.

Long Tube Header System - Sport Cats Configuration

This is the ULTIMATE header system engineered for the GT4RS, designed with over 30 years of Porsche expertise. This RENNKRAFT Long Tube Header System relocates the primary catalytic converter behind the rear axle, allowing for true long tube headers and replacing the factory 700 cell ceramic catalytic converter with a high-quality HJS 200 cell tri-metallic sport catalytic converter. The combination of the long tube design and sport catalytic converter drastically improves both power and sound without triggering a CEL (Check Engine Light) due to the heavy metal loaded HJS catalytic converter. The integrated RENNKRAFT system allows for easy swapping between cats and cat bypass using quick-release v-band clamps.

Power Gains:

• Maximum gains of 48 WHP and 54 ft/lbs of TQ at 4700 RPM (equivalent to 53 HP at the crank).
• Peak wheel horsepower increases from 456 to 490.
• Adds +57HP at the crank and +48 WHP with +64ftlb torque / 54 ft/lbs of TQ at 4700 RPM.

This system is guaranteed to be the World's Very Best GT4RS Spyder RS complete engineered system, offering the best sound, maximum power, maximum durability, and best components.

Additional Features:

• Saves 5 lbs / 2.3 KGs with cats and 13 lbs / 5.9 KGs with cat bypass compared to the stock Porsche system.
• Equal length headers with Formula 1 / Indy car style high-velocity merge collectors.
• Constructed from CNC mandrel bent T304 stainless steel, bent in-house at Fabspeed on a UNISON limited defense quality all-electric bender.
• Bi-layer heat shielding consisting of a ceramic fiber core and stainless steel shell, capable of handling up to 2400F / 1300C.
• Investment cast stainless steel header flanges for maximum flow and strength.
• Modular RENNKRAFT design with a V-band clamp for quick swapping between HJS catalytic converters and cat bypass.
• No ECU tune required.
• Simple bolt-on installation, with no cutting or welding necessary.

Returns subject to a 25% restocking fee.