View cart “BMW 535i (2008-2010) Stage 1 Performance ECU Tune (N54)” has been added to your cart. $1,199.00 House of Power Stage 1 Mercedes S65 2006-2013 ECU Tuning 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: Mercedes S65 2006-2013 Stage 1 Performance ECU Tune quantity — OR — Add to cart Category: S65 Tags: benz, Dyno, ecu tune, mercedes, s65, stage 1, stage 2, tune Description Description +85 Horsepower +140 Torque Performance ECU Tune for the Mercedes S65 Engine (2006-2013) Eliminate Top Speed Limiter Increased Throttle Response Optimized Fuel and Spark Optimized for 93 Octane Related products BMW 335i (2007-2011) Stage 1 Performance ECU Tune (N54) $599.00 Select Options BMW 328i E90/E92 Stage 1 Performance ECU Tune (N52) $499.00 Select Options BMW 428i Stage 1 Performance ECU Tune (N20) $999.00 Select Options BMW 550i (2006-2010) Stage 1 Performance ECU Tune $1,099.00 Select Options