gmgracing

Hand crafted out of T304 Stainless steel and meticulously TIG welded to AWM aerospace specifications with great precision, the GMG 991 Turbo exhaust system is lighter than the factory system and exudes a level of quality that is unsurpassed. Weighing in at 37 pounds, the GMG Porsche 991 Turbo exhaust system is 20 percent lighter than the factory system.

The system features OBD2 compliant German made 200 cell sport catalysts with proper 02 sensor placement to ensure no CEL (Check Engine Light) and a proprietary crossover x-pipe to increase power by balancing exhaust gas pulse coming from the engine and adds to the signature sound that only the GMG WC system can offer.

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 while speeding up exhaust velocity. At lower revs, turbulence is formed as exhaust gases try to shuffle past a second column of gases coming from the other side. While always producing more power than the restrictive factory system. Exhaust speed is increased as the engine revs increase. The X-Pipe merges the exhaust into two uniform streams, allowing a smooth flow from engine to exhaust exit.

Stainless steel packing is used our mufflers to withstand extreme exhaust temperatures and high intensity acoustic pressures that are generated by the forced induction system that is located within very close proximity due to its rear engine configuration. This is one of the key advantages of the GMG exhaust system since most other exhaust systems uses fiberglass packing instead to lower costs, and they are prone to rapid deterioration.

The exhaust system is a direct bolt on replacement for the factory system.

Features:

- Horsepower and Torque Increased up to 35hp without software upgrade

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

- No unwanted cabin drone.

- Constructed out of US Made T304 Stainless steel

- Hand built in the USA

- Each system is individually serialized with laser etched badge

- Meticulously TIG welded throughout to AWM aerospace specifications.

- Signature Brushed Finish and Quad tip design.
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- Significant weight savings over the stock system.

- System Weight: 37 pounds

- Propriety Crossover center section with X pipe design

- OBD2 compliant German made 200 cell sport catalysts; No CEL (Check Engine Light)

- Stainless steel packing used in mufflers

- Gains up to 90 hp with software upgrade on 91 octane over 100 hp with 100 octane fuel.

- Direct bolt on replacement; All hardware and clamps included

– Requires no modification to vehicle

- System does not require any software tuning[/i


We are currently taking orders. Professional installation is available at our facility in Orange County, California. International shipping is available. For all questions and inquiries, or to place an order, please email me at Jerry@GMGRacing.com

96gator313

How much is the exhaust system?

sscofield

Maybe youu have stated before, but I don't recall.....does the system negatively affect Prosche Warranty?

gmgracing

To our understanding, the Magnuson-Moss Warranty Act says that a manufacturer cannot deny a warranty claim because of an aftermarket part, unless the part in question actually CAUSED the problem that the warranty claim is about. That means that if you install aftermarket shocks, and then your turbo blows, the manufacturer cannot deny you warranty coverage on the turbo. (Unless the shocks somehow directly caused the turbo failure, which defies reason.) But if you install an software upgrade that increases turbo boost, and then your turbo fails, the manufacturer could probably deny your claim. It is reasonable to think that increased boost could lead to a turbo failure.

-Jerry T

NVRANUF

FWIW... still prefer stock tips on 991 TT/S... YMMV

gmgracing

We do offer the option to use the stock tips.. No problem at all...

Stock tips or our quad tip set up.. We have you covered!