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BMS N63 Stage1 - Harness Type B (2012-2014) $325 including shipping!

This tune was on my car for only two months, then removed when I took the car in for service and never reinstalled. Perfect condition! Easy to install and gives an immediate 50 HP bump to your 550i. Does not throw codes!

From the Burger Motorsports web site:

This plug and play tuner attaches to sensors in the engine bay and works with your factory DME tuning to remap your boost, timing, and fueling for optimal performance and reduced turbo lag. It's designed specifically for the N63 and N63tu motors. Stage1 gains on the N63 are up to 40whp range on pump gas and up to 60whp range with the N63tu motor. With exhaust modifications and/or on racing fuels even higher power levels are possible. Don't pay 10x more for functionally identical piggyback systems or big name flash tunes that claim more power but put down slower times at the track.

Email Rob @ RWMarcario@verizon.net