6SpeedOnline - Porsche Forum and Luxury Car Resource - For Sale: GMG 991 Turbo(S) Exhaust

USED 10,000 MILES

GMG 991.1 Turbo(S) Exhaust -- Equipped with High Flow Cats and Black Ceramic Coated Quad Tips

Retails for $5510 after tax. $2,500 Cash, PayPal, or Venmo is fine.

Local pickup in Gardena CA or Laguna CA. Shipping Available upon request (professionally packed)

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Literature from their site;

"Handcrafted out of T304 Stainless steel and meticulously TIG welded to aerospace specifications with great precision, the system is lighter than the factory. Weighing in at 37 pounds, the GMG Porsche 991 Turbo exhaust system is 20 percent lighter than the factory system. The system features high flow German made HJS HD 200 cell sport catalysts and a crossover x-pipe to increase power by balancing the exhaust gas pulse coming from the engine and adds to the signature sound that only the GMG WC system can offer. The crossover x-pipe works by balancing the exhaust pulses from either side — or cylinder bank – of the engine. It allows the exhaust gases 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. The X-Pipe merges the exhaust into two uniform streams, allowing a smooth flow from engine to exhaust exit.

High quality stainless steel packing is used in the 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.

Using the factory bracket location, the exhaust system is a direct bolt on replacement for the factory system. To ensure no CEL (Check Engine Light) and proper operation of the vehicle, the HJS HD catalytic converters are OBD2 compliant and the O2 sensor bungs are placed at their proper locations.

There are three tip options. You can opt to reuse your factory tips for a stealth approach, or you can run our signature Quad-tips in either a brushed stainless finish or a heat-controlling black ceramic coating.

Features:

Horsepower and torque increased up to 35hp without software upgrade
Gains up to 90 hp with software upgrade on 91 octane over 100 hp with 100 octane fuel (pending development)
Deep aggressive exhaust notes at lowers revs & exotic high pitched exhaust notes at higher revs
German made HJS high-flow, 200 cell sport catalysts; OBD2 compliant, no CEL (Check Engine Light)
Crossover X-Pipe to balance exhaust pulse
Stainless steel packing used in mufflers
No unwanted cabin drone
Constructed out of US Made T304 Stainless steel
Significant weight savings over the stock system.
Direct bolt on replacement, All hardware and clamps included
Requires no modification to vehicle
Made right here in Southern California

Vehicle Fitment:

2013-2016 Porsche 991.1 911 Turbo / Turbo S
2017-current Porsche 991.2 911 Turbo / Turbo S