Porsche 997.1 SpeedTech X-cellerator Performance Exhaust Exterior but when combined with larger

but when combined with larger throttle bodies they perform even better

Black Market and or using counterfeit HJS catalytic converter cores

Unlock your vehicles potential performance and engine response with maximum turbo spool and improved efficiency

Easily flash your Cayenne with a Fabspeed ECU Tune utilizing the included handheld device

Includes integrated O2 sensor bung for fuel-injected cars

Porsche 997.1 SpeedTech X-cellerator Performance Exhaust Exterior but when combined with largerThe Speed Technologies 997. 1 exhaust system is designed to offer the discerning Porsche enthusiast the ultimate exhaust system with a number of performance and sound options. Our exhausts provide a louder, deeper tone, improved throttle response and increased HP, as compared to the OEM Porsche exhaust. All systems are constructed with T304 stainless steel and fitment is perfect. High quality welds, low restriction straight thru design and a mirror