Saturday, March 1, 2014

GMG Racing Porsche 996 GT3 Exhaust Package - Sport Mufflers & X-Pipe High Flow Cats

GMG Porsche 996 GT3 Sport Mufflers
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We have suddenly received a few orders for our GMG Porsche 996 GT3 Sport Muffler system. They are in production and we are taking more orders. Despite being 2 generations old, we have not forgotten about the 996 GT3. It is still a very potent car on the track and continues to deserve the best aftermarket support.

The GMG Racing Porsche 996 GT3 Sport Muffler is a bolt-on, direct replacement exhaust system. Utilizing the finest materials, unparalleled craftsmanship, and proven designs, it is a superb race bred exhaust system that increases overall performance, reduces weight, and produces an exotic exhaust note. 

Handcrafted out of US Made T304 stainless steel and meticulously TIG welded to AWM aerospace specifications with great precision, the GMG 996 GT3 Sport Muffler is lighter than the factory system and made the highest level of quality. 

Using stainless steel packing material in the mufflers, the GMG exhaust is designed to withstand extreme exhaust temperatures and high intensity acoustic pressures. This is one of the key advantages of the GMG exhaust system since many competitor exhaust systems use fiberglass packing instead to lower costs, and they are prone to rapid deterioration. The exhaust system is a complete bolt-on upgrade. 


- Horsepower and torque increased throughout rev range 

- Deep aggressive exhaust notes at lowers revs & exotic high pitched exhaust notes at higher revs 

- Constructed out of T304 Stainless steel 

- Meticulously TIG welded throughout to AWM aerospace specifications 

- Stylish laser-cut GMG logo on brackets 

- Stainless steel muffler packing to withstand extreme temperatures 

- Brushed stainless finish - Significant weight savings over the stock system 

- Direct bolt on replacement 

- 50 States Emissions Legal 

- Hand built to Order and Individually Serialized 

- Made in USA 

GMG Porsche 996 GT3 X-Pipe High Flow Cats

The GMG Porsche 996 GT3 high flow cats are direct high performance replacements for the restrictive OEM catalytic converters.

To increase horsepower and torque throughout the rev range, our GMG system utilizes German made HJS HD high flow 200 cell catalytic converters and our proprietary crossover x-pipe.

Our proprietary crossover x-pipe works by balancing the exhaust pulses from either side— or cylinder bank - of the engine. It allows the exhaust to flow down the path of least resistance. At lower revs, turbulence is formed as exhaust gases try to shuffle past a second column of gases coming from the other side. The exhaust gas is pushed out harder as the engine spins faster. The X-pipe merges this chaos into two uniform streams, allowing a smooth flow from engine to tailpipe. Both streams keep each other up to speed, which draws even more spent exhaust out the cylinders.

The system is constructed of Type 304 aerospace grade stainless steel mandrel bent tubing that is meticulously TIG welded to AWM aerospace specifications.

The high-flow catalytic converter/ x-pipe is a complete drop-in upgrade. Using CNC machined flanges to prevent warping and expansion, and factory exhaust hanger locations, the system will bolt up to the factory OEM or GMG mufflers. To ensure proper functioning and no CEL, the catalytic converters are OBD2 compliant and the oxygen sensor bungs are placed at the proper locations.


- HJS HD German made 200 cell high flow catalytic converters
- Horsepower and torque increased throughout entire rpm range
- Propriety crossover X-Pipe to balance exhaust pulse

- Constructed out of T304 stainless steel
- Brushed Stainless Finish - CNC machined flanges to prevent warping and expansion

- Direct bolt on replacement
- Compatible with both OEM & GMG Mufflers
- Made in USA

For all questions and inquiries, or to place an order, please email

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Orange County, California, United States
I am a freelance automotive photographer / journalist with a deep passion for cars and photography. Blessed with living in Southern California - the mecca and melting pot of different automotive cultures - I get to cover everything from rare European exotics to the Japanese imports to Off-Road trucks. Shooting Motorsports is my niche and I have covered a wide range of series such as: Formula Drift, XDC Drift, D1GP, Redline Time Attack, SCCA World Challenge, American Le mans Series, IZOD Indy, MORE Off-Road. My works have been featured in print publications such as AutoSalon, Rides Magazine, Import Tuner and Heavy Hitters magazines and various online magazines as well such as,,, and Thanks again for looking at at my page and please check back regularly for updates! For any inquiries, compliments, critiques or criticisms, please contact me via email