Active Autowerke X3M and X4M Valved Rear Axle - back Exhaust (11-103) 16150 Large 90mm Throttle Bore

Large 90mm Throttle Bore

The added downforce stabilizes the car's chassis during hard cornering and increases traction for faster lap times

You can tell by throttling up on the rpms that this Red Sport is definitely got some power behind it

Independent supercharger oil cooler and AA oil breather system

3 2007 GMC Envoy Engine: 5

Active Autowerke X3M and X4M Valved Rear Axle - back Exhaust (11-103) 16150 Large 90mm Throttle BoreThe Active Autowerke Valved Rear Axle Back Exhaust is designed specifically for the F97 F98 BMW X3M and X4M models to enhance the factory exhaust sound while maintaining optimal flow and stock valve operation. Engineered to increase sound volume and resonance over the OEM system Reuses original BMW valve actuators for stock valve control Made in the USA from durable 304 stainless steel Test fitted on dedicated F97 F98 exhaust fixtures for guaranteed