VRSF Race Downpipes BMW M3 M4 S58 G80 G82 G83 BrushedVRSF 3 High Flow Stainless Steel Downpipes For your 2020+ BMW M3, M4 with the S58 Engine We are proud to introduce our VRSF 3 Race Downpipes for the S58 G80 G82 G83 M3, M4. These 3 downpipes are the best bang for the buck mod available for your S58, with gains from 27hp & 33tq when tuned. By eliminating the restrictive catalytic converters in the factory downpipes, back pressure is reduced significantly which results in faster spool, an increase in