Audi S4 B5 Bi-Turbo 1200 HP Extreme Acceleration & Sound Acceleration & Sound Drag & Track by turboandstance - February 25, 2017July 22, 2017 Here we got a Audi S4 Bi-Turbo with two Garrett GT-3086 turbochargers and mapped on a KMS Standalone ECU. The cylinderhead has been taken care off and the block has been completely build with forged pistons and more. Watch the video of the Audi S4 Bi-Turbo 1200HP with two Garrett GT-3086