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GMG Racing Long Tube Headers 991 GT3/GT3RS
2017-current Porsche 991.2 911 GT3
2014-2016 Porsche 991.1 911 GT3
2016 Porsche 991.1 911 GT3RS
2016 Porsche 991 911 R
Engineered and developed on the track, the GMG WC Long-Tube headers were designed to provide a consistent increase in power throughout the powerband. The design stems from our professional racing experience in running Porsche 3.8L and 4.0L engines throughout a broad spectrum of motorsports. While this header increases overall power output, it’s focus in the low and mid-range powerband.
This header incorporates German-made HJS 200-Cell Metal-Matrix Sport Catalytic Converters. These dramatically cut down on obnoxious fumes inherent with race headers. HJS manufacturers the finest Catalytic Converters on the market today.
Innovative Design - While the header features a Long-Tube unequal-length design, it is still modular with the rest of the exhaust system. This means you will be able to keep your sport button function if you are racing at a noise-restricted circuit.
Fabrication - Each header is fabricated right here in Southern California. We use only the highest quality US-produced stainless steel tuning and laser-cut flanges. Each join is TIG welded and precisely normalized. The finished header features an exceptional finished and is peerless in its quality and durability.
Equal length runners
True 3-into-1 F1-style merge collector
German made high-flow 200 cell HJS HD catalytic converters
Increase horsepower and torque throughout rev range
TIG welded using US Made T304 stainless tubing
CNC machined extra-thick flanges to prevent warping
Direct bolt on replacement, no removal of bumper required
Sport button remains fully functional for everyday use
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