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.

Highlights:

• 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

Vehicle Fitment: 

• 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

**Installation is available at our Southern California
location, or at any of our world-wide network of authorized dealers.
 This system is not CA SMOG legal and therefore intended for off-road
use only.