We’ve fitted our BMW E46 M3 with Supersprint stepped headers, full Supersprint exhaust, and paired it with a custom Evolve ECU tune — now it’s time to hit the dyno and see the real gains. This is the ...

The legendary BMW E46 M3 was a trailblazer ever since it was ... That's why Supersprint took its time when developing a custom exhaust for the beast that revved well over 8,000 RPM.