STOCK = 500, 542, 563, 591BHP --> TUNED = 668BHP STOCK = 568, 590ft/lbs --> TUNED = 685ft/lbs Audi's 4.0 TFSI is mighty in the RS6, RS7 and SQ8. However much power was left on the table to allow room for the RS models. VelocityAP's software unlocks nearly as much as 168BHP and huge torque, without overtaxing the engine.