N20 Downpipe for F Series BMW 228i/ 320i/ 328i/ 428i/ 528i - ARM Motorsports 2013 BMW 4 Series: 2015-2019 F32/F33/F36

BMW 4 Series: 2015-2019 F32/F33/F36 B58 440i/440iX

The front can fit any thickness spacer

If you're running a stock midpipe and catback section you'll notice a substantial increase in volume under full throttle and a moderate increase in sound during part throttle

Catted Version Available

N20 Downpipe for F Series BMW 228i/ 320i/ 328i/ 428i/ 528i - ARM Motorsports 2013 BMW 4 Series: 2015-2019 F32/F33/F36HIGHLIGHTS 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