Stertman Motorsport ECU Software Upgrade For Audi S4/S5 3.0T (B9) Carrera GT and additional parts could alter

and additional parts could alter the price

For optimal clearance between downpipe and driveshaft

Upon inspection you will notice a flare which is nearly 4"

- Estimated crankshaft power output of 543 horsepower and 579 lb

Stertman Motorsport ECU Software Upgrade For Audi S4/S5 3.0T (B9) Carrera GT and additional parts could alterWe are pleased to offer Stertman Motorsport performance software for your B9 S4 S5. With over 20 years of experience in tuning VAG & BMW platforms, along with advanced development and diagnostics equipment, Stertman Motorsport is one of the premier software tuners in the world. Each tune is developed and rigorously tested in house, both in a controlled dyno environment as well as on rolling roads. Stock Power: 354 HP 368 TQ STM Stage 1: 405 HP 450 TQ