View cart “BMW 545i (2003-2005) Stage 1 Performance ECU Tune (E60)” has been added to your cart. $599.00 BMW 135i Stage 1 Performance ECU Tune (N54) 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 135i Stage 1 Performance ECU Tune (N54) quantity — OR — Add to cart Category: BMW 135i Tags: 135i, bmw, Dyno, tune Description Description +135 Horsepower +165 Torque Performance ECU Tune Features Eliminate Top Speed Limiter Increased Throttle Response Optimized Fuel and Spark Optimized for 93 Octane Related products BMW 535i (2008-2010) Stage 1 Performance ECU Tune (N54) $999.00 Select Options BMW 335d (2007-2008) Stage 1 Performance ECU Tune (N57) $1,099.00 Select Options BMW 535d (2007-2008) Stage 1 Performance ECU Tune (N57) $1,099.00 Select Options BMW 128i Stage 1 Performance ECU Tune $600.00 Select Options