APR Plus is now available for the 4.0 TFSI S6, S7, A8L and RS7! APR Plus give you a Limited Powertrain Warranty along with an APR Plus ECU Upgrade capable of up to 555 HP / 609 FT-LBS on the S6 and S7, 530 HP / 586 FT-LBS on the A8L, and 665 HP / 728 FT-LBS on the RS7! For more details please visit goaprplus.com.