N20 Downpipe - F30 320/328i N54 make the exhaust burbles more

make the exhaust burbles more audible (even on OEM programming)

2015-2018 M3-M4 only

after installing our F80 downpipes and switching to a Stage 2 flash we made 539whp/544wtq

This kit is capable of providing supplemental fueling to all BMW's equipped with B58 Gen 1 engine (see fitment guide for full details)

The bumper stays on during install

N20 Downpipe - F30 320/328i N54 make the exhaust burbles moreHIGHLIGHTS Gain up to 17whp 25wtq Faster Turbo Spool Improved Exhaust Note Upgrade to Stage 2+ Tuning SS304 Stainless Steel PROFILE The ARM Motorsports N20 Downpipe is the best hardware upgrade to get the most power from your 320i or 328i. The N20 has a stock downpipe with a catalyst that drastically restricts exhaust flow. This limits not only the amount of power N20 can make on the stock tune, but also prevents upgrading to a stage 2 tune due to