Product Page APR is pleased to present the ultimate ECU Upgrade for the Audi RS6 5.0TFSI V10 Twin Turbo. After months of long nights and many hours of testing, development and more testing, we are pleased to offer you an ECU recalibration that is second to none. APR's extensive research and development provides you with a powerful ECU Upgrade with no loss of drivability or reliability. Expect tremendous increases in power and torque across the entire power band, improved throttle response and a smoother, more powerful top end. The RS6's engine management presented new challenges to the Engineering Teams at APR in the form of new control strategies for torque management. Significant time was spent researching these new strategies to properly request more load and therefore more boost in the lower end of the power band. The results were simple, a torque curve that crushes the competition and delivers a rush of power like no other in the industry. For safety and shift quality concerns, APR's Engineering Teams spent even more time determining appropriate levels of torque to deliver in first gear. As such, maximum boost pressure is lower in 1st gear than all other gears. This resulted in the most powerful yet reliable software possible. The Audi RS6 5.0TFSI V10 Twin Turbo ECU Upgrade is an expertly recalibrated engine control strategy that remaps boost, timing, air fuel ratios and other engine management paramaters to provide smooth and reliable power as if intended by the OEM. APR's ECU Upgrade is developed to work within the OEM and Tier 1 Supplier specifications for engine component stress tolerances and performance specifications. APR's ECU Upgrades are available in octane specific versions to allow you to take full advantage of the fuel quality available in your area. Stage I ECU Upgrade Not only does our Stage I ECU Upgrade give you higher peak numbers of 741 horsepower and 779 ft-lbs of torque, but also gains of up to 237 horsepower and 299lb-ft are available at lower RPM's with 104 RON! APR's ECU Upgrade is the best power per dollar modification for the new 5.0 TFSI and gives it just the extra edge these cars lack from the factory without pushing the limits. With factory like smoothness and drivability APR's ECU Upgrade will fill the void in an otherwise excellent car. APR Stage I ECU Upgrade Calibration Report Stock As Reported by Audi 572 HP 480 TQ Stock As Measured by APR 597 HP 507 TQ 98 Octane RON 665 HP 716 TQ 174 HP @ 4350 RPM 237 TQ @ 3600 RPM 104 Octane RON 741 HP 779 TQ 237 HP @ 4550 RPM 299 TQ @ 3600 RPM Application Guide All C6 RS6 5.0 TFSI V10 Engines Directport Programmed through the OEM ODBII Port - ECU does NOT need to be removed! Currently Single Program Only Please contact a Local APR Dealer for Pricing!