R1 Performance Package for McLaren 650S mercedes-benz-slk-class--171---2004-2010--slk-55-amg-esr5743216 Crank Performance Numbers are calculated

Crank Performance Numbers are calculated with a 14% Drivetrain loss for all wheel drive vehicles

Current Consumption: 30mA (60mA while plugged in to PC/Tablet)

The maximum power number reached with the RENNtech ECU Upgrade for the AMG GT R is 659 HP and 614 LB-FT

670 HP / 738 LB-FT

R1 Performance Package for McLaren 650S mercedes-benz-slk-class--171---2004-2010--slk-55-amg-esr5743216 Crank Performance Numbers are calculatedR1 Performance Package for the McLaren 650S. Includes RENNtech ECU Upgrade and Akrapovic Slip On Titanium Exhaust System. RENNtech has been at the forefront of ECU tuning since electronic engine management started to show up in vehicles during the mid 1980's! Our experience, countless hours of in house research, development and exhaustive testing ensure that our proprietary ECU upgrade offers incredible performance gains and rock solid daily driver