Audi S6 Avant V8 ECU Flashed and Tuned by VR VRTuned.com June 3, 2015 Company News, Product Info The big 4.2L V8 in the Audi S6 and S4 has been a very popular platform with all its torque and grunt. Though most would still prefer the old B5 2.7 Turbo, the S6 V8 is definitely still good. This...
