Performance ECU Software Precisely Engineered for your Audi C8 A6. This vehicle has added support through UniCONNECT+ which allows you to program your own vehicle right in your own garage. Unitronic software is flashed directly through the (OBDII) diagnostic port of your vehicle (10-15 minutes). Unitronic Stage 1 Performance Software is precisely calibrated for use with 91 oct/95 ron fuel and provides huge power gains over stock while maintaining an OEM-like driving experience with exceptional reliability. Unitronic Stage 1+ Performance software is precisely calibrated for use with 93 AKI / 98 RON fuel. Features: Gains over stock: +88HP / +97TQ (91 Octane Fuel) (Stage 1) Gains over stock: +119HP / +112TQ (93 Octane Fuel) (Stage 1+) Engineered with Strict Industry Standards Extensively Tested Under Various Driving Conditions Factory Safety Limiters Retained Advanced Torque Management by Gear (For maximum acceleration) Engine Temperature Protection (Rev Limit based on Engine Coolant Temperature) Optimized Responsiveness and Drivability Optimized Smoothness and Driving Comfort Power Delivery Perfectly Optimized Throughout the Power Band Improved Fuel Efficiency Ignition Timing Precisely Calibrated for Higher Octane Fuel Speed Governor Removed Hardware Requirements: None What's Included: Unitronic ECU Tune Unitronic UniCONNECT+ Cable (OPTIONAL)