Performance Stage 1 ECU Software Precisely Engineered for your D5 S8 with the 4.0 EA825 engine.  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).

Features:

• Stage 1 gains over stock: +137HP / +104TQ (91 Octane Fuel)
• Stage 1 gains over stock: +190HP / +119TQ (93 Octane Fuel)
• Engineered with Strict Industry Standards
• Extensively Tested Under Various Driving Conditions
• Factory Safety Limiters Retained
• Optimized Responsiveness and Drivability
• Optimized Smoothness and Driving Comfort
• Power Delivery Perfectly Optimized Throughout the Power Band
• Improved Fuel Efficiency
• Speed Governor Removed
• Hardware Requirements: None
• An upgraded intake is recommended to achieve the advertised power figures. 728HP/699LB-FT max w/ Stock Intake

What's Included:

• Unitronic Stage 1 or 1+ ECU Tune
• Unitronic UniCONNECT+ Cable (OPTIONAL)