Whether or not you have a BMW M3 or M4, B&B Automobiltechnik has just introduced a new Comprehensive Performance Package for the powerful sedan. Working with a turbocharged straight-six engine, B&B proceeded to squeeze out more power with one of three stage kits, lifting power to a maximum of 580HP. Increases come with tweaks to the turbo, a new high flow intake, and bigger exhaust system joined with revised engine ECU mapping. An adjustable suspension kit, a stronger braking system, and new 20-inch wheels finish the work. See more angles of B&B's new kit in the gallery below and visit their website to transform your ride.