Fabspeed Sport Headers Porsche 997.1 GT3 / GT3 RS (2006-2009)

Fabspeed Motorsport 997 GT3 / GT3 RS Sport Headers are designed to unlock the true performance potential of Porsche’s legendary Mezger-powered GT3 platform. By replacing the restrictive factory header system with precision-engineered equal-length stainless steel headers, these dramatically improve exhaust scavenging, increase exhaust flow, and allow the 3.6L and 3.8L flat-six engines to breathe more efficiently throughout the RPM range. The factory GT3 already delivers an incredible driving experience, but the OEM exhaust manifolds remain a significant restriction—especially on track-driven or tuned vehicles. Fabspeed’s equal-length primary design improves cylinder evacuation and exhaust pulse tuning, resulting in stronger midrange power, increased top-end performance, and a sharper, more motorsport-inspired exhaust note. Constructed from mandrel-bent T304L stainless steel with integrated high-flow catalytic converters, these headers are engineered for enthusiasts looking to maximize performance without sacrificing drivability. Whether paired with a factory rear exhaust or a full motorsport exhaust setup, this upgrade delivers noticeable gains in both power and driver engagement. Fitment Notes Fits Porsche 997.1 GT3 and GT3 RS (2006-2009) Compatible with 3.6L and 3.8L Mezger naturally aspirated flat-six engines Direct bolt-on replacement for factory exhaust manifolds Designed for use with OEM or aftermarket cat-back exhaust systems Check local emissions regulations before installation Included Left-side sport header assembly Right-side sport header assembly Integrated high-flow catalytic converters O2 sensor bungs Installation hardware and mounting components Product Specs Material: T304L stainless steel construction Design: Equal-length header configuration Primary Tubing Diameter: 1.75 inches Catalytic Converters: High-flow HJS HD metal-core sport cats Construction: CNC mandrel-bent tubing O2 Sensor Compatibility: Retains factory sensor locations Application: Naturally aspirated Mezger GT3 engine platform Product Features Equal-length header design improves exhaust scavenging and cylinder evacuation Increases horsepower and torque throughout the powerband Enhances throttle response and high-RPM engine performance Produces a sharper, race-inspired Mezger flat-six exhaust note Premium HJS sport catalytic converters balance performance and drivability Direct bolt-on installation with OEM-quality fitment and durability