APR is pleased to present the ultimate ECU Upgrade for the Audi B8.5 S4 & S5 TFSI V6 is now available through APR’s patented DirectPort Programming! Any APR Dealer in the world, connected to the Internet, has direct access to APR’s latest ECU upgrades for loading directly over the vehicle’s OBD-II port. This completely eliminates the need to remove and open the ECU for currently available files and can be uninstalled at any time without a trace!

The APR Stage I ECU Upgrade gives you higher peak numbers of 336 horsepower and 324-ft. of torque measured at all 4 wheels, but also gains of up to 77 all wheel horsepower and 65 lb-ft are available throughout the power band! For those demanding more torque, The APR Supercharger Pulley Upgrade is the answer. Spinning the supercharger faster increases air flow allowing for higher boost levels and more power. The gain in torque is felt immediately, but the results are present across the entire powerband. Expect gains of 93 all wheel horsepower over stock! Software is included as a free upgrade for APR Stage I customers with the purchase of an APR Supercharger Pulley Upgrade.