For the ultimate in 325 performance look no further. Dinan's Supercharger System features fully re-calibrated engine management for exceptional power on command, without sacrificing the civility and reliability you expect of a BMW automobile. The system produces an impressive 255 horsepower and 236 lb/ft of torque, making for very impressive acceleration. The Dinan Supercharger System for the 325 is sure to please the most demanding driving enthusiast, while at the same time retaining the civility and reliability expected of a Dinan-tuned 3. The Free Flow Exhaust is recommended, as well as the High Flow Throttle Body for optimum performance and even more immediate throttle response.