$1,199.00 Audi RS4 2012+ Performance ECU Tune 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: Audi RS4 2012+ Performance ECU Tune quantity — OR — Add to cart Category: Audi RS4 Tags: audi, Dyno, ecu tune, rs4, stage 1, stage 2, tune Description Additional information Description +100 Horsepower +75 Torque Performance ECU Tune for the Audi RS4 Eliminate Top Speed Limiter Increased Throttle Response Optimized Fuel and Spark Optimized for 93 Octane Additional information Stage 2 Stage 2 Related products BMW 535i (2011-2016) Stage 1 Performance ECU Tune (N55) $999.00 Select Options BMW M5 E6x (2006-2011) Stage 1 Performance ECU Tune $599.00 Select Options BMW 335i (2011-2013) Stage 1 Performance ECU Tune (N55) $999.00 Select Options BMW 328i E90/E92 Stage 1 Performance ECU Tune (N52) $499.00 Select Options