Supersprint F1 Race Lightweight Rear Exhaust - BMW 3 Series E92 | E93 M3The new generation of Supersprint rear mufflers, called F1 Race, bring the sound of the E92 M3 to another level. The canister innards use a mix of resonating chamber and straight thru design, which greatly enhances the sound note in the high rpm range, while leaving the inside cabin noise within reasonable levels, at cruising speeds. Of course, the increase in performance, when used in conjunction with the remaining, well proven Supersprint exhaust