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We are proud to introduce the VRSF 3" Catless Downpipes for the S55 F80/F82 M3 & M4 which are one of the only downpipes to feature a cast stainless steel v-band to pipe transition. These 3" downpipes are the best bang for the buck mod available for your S55, with gains from 25hp & 30tq when tuned. By eliminating the restrictive catalytic converters in the factory downpipes, backpressure is reduced significantly which results in faster spool, an increase in power & a more aggressive exhaust note.