APR Audi S8 (D4) 4.0T Engine ECU UpgradeSD15866S8
Regular price $1,999.99
APRs 4.0 TFSI V8 ECU Upgrade is an expertly recalibrated engine control strategy that primarily remaps the engine's operating parameters, within the factory ECU, to provide smooth and reliable power as if intended by the OEM. APRs ECU Upgrade is developed to work within the OEM and Tier 1 Supplier specifications for engine component stress tolerances and performance specifications. Available in octane-specific variations, APRs calibrations allow you to take advantage of fuel quality available in your area. APRs patented EMCS functionality puts the control of your engines operation at your fingertips and allows for additional features and options to be installed to your OEM ECU. APR STAGE 1 UPGRADE The APR Stage I ECU Upgrade gives you higher peak numbers of 647 HP/671 FT-LBS on 93 (R+M)/2 octane and up to 685 HP/679 FT-LBS on 100 (R+M)/2 octane race fuel. As much as +130 HP and +142 FT-LBS of torque are available through the power band! APRs ECU Upgrade is the best power per dollar modification for the new 4.0 TFSI V8 and gives it just the extra edge these cars lack from the factory without pushing the limits. With factory-like smoothness and drivability, APRs ECU upgrade will fill the void in an otherwise excellent car.