Product Page APR is pleased to present the ultimate ECU Upgrade for the Audi TT RS 2.5 TFSI. 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 TT RS'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. The Audi TT RS 2.5 TFSI 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 451 horsepower and 516 ft-lbs of torque, but also gains of up to 150 horsepower and 189lb-ft are available at lower RPM's with 104 RON! APR's ECU Upgrade is the best power per dollar modification for the new 2.5 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 338 HP 332 TQ Stock As Measured by APR 352 HP 341 TQ 98 Octane RON 403 HP 462 HP +106 HP @ 4150 RPM +134 TQ @ 4150 RPM 104 Octane RON 451 HP 516 TQ +150 HP @ 4300 RPM +189 TQ @ 4000 RPM Application Guide All Audi TT RS 2.5 TFSI's in 6MT or S-Tronic. ECU programmed through Direct Port Programming. ECU does NOT need to be removed. Please contact a local APR Dealer to purchase or visit www.GoAPR.com for an order form!