VRSF Race Downpipe BMW M240i 340i 440i 540i B58 Heat Shield 16-22VRSF Race Downpipe BMW M240i 340i 440i 540i B58 Heat Shield (2016 2022) The factory downpipe on the B58 is the single best bolt on upgrade you can make. By eliminating the restrictive catalytic converter and reducing back pressure, the VRSF Race Downpipe delivers faster spool, 25 30 horsepower gains with a tune, and an exhaust note that finally matches what the B58 is capable of. Full 4. 5" SS304 stainless steel with heat shield included. ModsDirect
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