VRSF BMW X3M/X4M S58 Catted Downpipes (2019-2022 F97 & F98)VRSF are proud to introduce their Catted Sports Cat Downpipes for your F97 & F98 BMW X3M & X4M. These stainless steel tube downpipes 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 VRSF's high flow, 200 cell catalytic converter, back pressure is
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VRSF BMW X3M/X4M S58 Catted Downpipes (2019-2022 F97 & F98)