Tuning the Audi S7 can be done the conventional way of a ECU Flash, or with the VR Tuned plug and play tuning box. The tuning box is a great unit to gain huge amounts of horsepower while not affecting your cars warranty or tampering with your ECU. The plug and play box comes premapped and taps into your vehicles boost and manifold sensors as well as the vehicles camshaft sensor. Controlling the signals gives the 4.0L Bi-Turbo V8 a boost from 420 horsepower to 540 horsepower with a even larger gain of 150nm of torque as tested on 93 octane. Our customer Tuan in Texas has this beautiful white S7 now taking on the power of the RS7 and competitors such as the BMW F10 M5 and the Porsche Panamera.