View cart “BMW M5 E6x (2006-2011) Stage 1 Performance ECU Tune” has been added to your cart. $949.00 BMW 235i (2012+) Stage 1 Performance ECU Tune (N55) Want to add even more Horsepower? Upgrade to Stage 2 ECU Tune. (Catless Application) Adds an approx. 30-40 additional Horsepower! Check the box below: Upgrade to Stage 2 + $399.00 Product price Additional options total: Order total: BMW 235i (2012+) Stage 1 Performance ECU Tune (N55) quantity — OR — Add to cart Category: BMW 235i Tags: 235i, bmw, Dyno, ecu tune, n55, stage 1, stage 2, tune Description Description +110 Horsepower +130 Torque Performance ECU Tune Features Eliminate Top Speed Limiter Increased Throttle Response Optimized Fuel and Spark Optimized for 93 Octane Related products BMW 428i Stage 1 Performance ECU Tune (N20) $999.00 Select Options BMW 335i (2011-2013) Stage 1 Performance ECU Tune (N55) $999.00 Select Options BMW 335i (2007-2011) Stage 1 Performance ECU Tune (N54) $599.00 Select Options BMW M6 F10/F13 (2012-2016) Stage 1 Performance ECU Tune $2,499.00 Select Options