Supersprint are often called upon to provide closed-door dyno testing for the worlds top Private & Factory teams and you can't get a better endorsement of a product than on the track.
The E46 M3 Supersprint back box is made from 100% thin wall Stainless Steel with quad 80mm pipes shaving valuable Kgs. It is more free-flowing reducing back pressure and increasing BHP and Torque.
Available for the M3 Coupe, Cabriolet and CSL
