VRSF Stainless Steel Test Pipes 2008 – 2013 BMW M3 S65 V810902085 We are proud to introduce our VRSF bypass pipes for the E90 E92 M3 which are the best bang for the buck mod available for your S65, with gains from 25hp & 25tq when tuned. By eliminating the restrictive 400 cell catalytic converters in the factory downpipes, backpressure is reduced significantly which results in an increase in power & a more aggressive exhaust note. Our bypass pipes are constructed from mandrel bent, 304 grade stainless steel