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VRSF 3.5" Cast Stainless Steel Downpipes | F97 X3 M · F98 X4 MWe 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

The transmission engagement has been reworked to reduce annoying lag when shifting from park or reverse into drive

Increase of 60 HP*

racing series

Diameter 5"-6" Cone

The IE Supercharger Pulley Removal Tool for 3

Genuine Original diverter valve

Let your S4

Adding your IE Cast Turbo Inlet Pipe upgrade removes the factory inlet's flow restriction and allows your turbo to breathe freely and make more power

Increases performance through increased size

no modifications necessary

/ Stock - 185 lbs

CNC machined