VRSF 3.5" Cast Stainless Steel Downpipes | F97 X3 M · F98 X4 M E90 · E91 325i 3.0L I6 [N52] it's the only way to

it's the only way to ensure an accurate fit and perfect seal

Pair together with the Dinan Rear Diffuser Surround to complete the full rear look

The harness kit on its own will not function without a matching IE TrueFlex ethanol tune

Optimized launch control

but keep them tall enough so they have enough volume to absorb a hard hit

VRSF 3.5" Cast Stainless Steel Downpipes | F97 X3 M · F98 X4 M E90 · E91 325i 3.0L I6 [N52] it's the only way toWe are proud to introduce our Racing Downpipes for your F97 & F98 BMW X3M & X4M. These stainless steel tube down pipes are the best bang for the buck mod available for your S58, with gains from 30 whp & 35 wtq as a direct bolt on and gains of up to 60 whp and 100 wtq when paired with a DME remap. By replacing the restrictive catalytic converter in the factory downpipes with our high flow, 200 cell catalytic converter, back pressure is significantly