$1,299.00 Audi S4 2009-2016 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 S4 2009-2016 Performance ECU Tune quantity — OR — Add to cart Category: Audi S4 Tags: audi, Dyno, ecu tune, s4, stage 1, stage 2, tune Description Additional information Description +85 Horsepower +70 Torque Performance ECU Tune for the Audi S4 Eliminate Top Speed Limiter Increased Throttle Response Optimized Fuel and Spark Optimized for 93 Octane Additional information Stage 2 Stage 2 Related products BMW 535d (2009-2013) Stage 1 Performance ECU Tune (N57) $1,099.00 Select Options BMW 335d (2009-2013) 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 335d (2007-2008) Stage 1 Performance ECU Tune (N57) $1,099.00 Select Options