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 with the Porsche 3.8L and 4.0L engine platforms. While this header increases overall power output, its focus is in the low and mid-range powerband.
This header incorporates German-made HJS 200-Cell Metal-Matrix Sport Catalytic Converters. HJS manufactures the finest Catalytic Converters on the market today and also responsible for producing most OEM sports car catalysts.
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 finish and is peerless in its quality and durability.
- Sport button remains fully functional
- 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 the rev range
- TIG-welded using US Made T304 stainless tubing
- CNC machined extra-thick flanges to prevent warping
- Direct bolt-on replacement, with only minimal modification to the rear diffuser needed.
- 2017-current Porsche 991.2 GT3
- 2014-2016 Porsche 991.1 GT3
- 2016 Porsche 991.1 GT3RS
- 2016 Porsche 911 R
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