N20 Downpipe - F30 320/328i

HIGHLIGHTS • 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 excessive back-pressure.  An N20 downpipe upgrade is the first hardware upgrade every N20 owner should invest in.  Upgrading your downpipe unlocks the most power, increases turbo spool, allows you to run stage 2+ tuning, and improves the exhaust note of your N20 powered BMW.  CONSTRUCTION The ARM N20 Catless Downpipe is built with mandrel bent SS304 stainless steel and backed by the ARM Motorsports Lifetime Warranty.  The ARM N20 Downpipe starts with a 4" diameter at the precision CNC machined turbo v-band connection and