Putting 306bhp through the rear wheels or the xDrive system requires a driveline capable of handling serious torque, whether you run the smooth ZF8 automatic or the engaging 6-speed manual gearbox. Manual F30 owners looking to tune their N55 will need to upgrade their friction materials; our Uprated Clutches & Flywheels (including the popular 550i upgrade) are engineered to hold massive torque increases without slipping. To maximize traction out of corners on RWD models, installing mechanical Differentials (Limited-Slip) will completely transform the handling dynamics of your 335i. Eliminate unwanted chassis flex and subframe movement during hard launches with stiffened polyurethane Drivetrain Bushes, backed by our extensive range of Misc Drivetrain Parts.