Stertman Motorsport ECU Software Upgrade For Audi S4/S5 3.0T (B9) Carrera GT We recommend disabling your Soundaktor

We recommend disabling your Soundaktor (noise amplifier) to fully enjoy the true sound of your motor and remove excessive drone caused by the device

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

For optimal clearance between downpipe and driveshaft

G12 7-series

To see how well the S6 and S7 will launch with this software upgrade

Stertman Motorsport ECU Software Upgrade For Audi S4/S5 3.0T (B9) Carrera GT We recommend disabling your SoundaktorWe 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