2011-2018 BMW S63 F10/F12 M5 & M6 3" Stainless Steel Exhaust Downpipes compatibleWe are proud to introduce our 3" Catless Downpipes for the S63 F10 F12 M5 & M6 which feature a CNC stainless steel v band to pipe transition. These 3" downpipes are the best bang for the buck mod available for your S63, with gains from 50hp & 60tq 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
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