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 E30 M3 back box is available in a choice of tail pipe sizes and is made from thinwall Stainless Steel removing weight at the same time. It is freeing flowing thus reducing back pressure and increasing BHP and Torque
Available for the M3 only
