RENNtech Porsche ECU Upgrade 997 GT3 (435 HP / 314 LB-FT) hsm no cutting required

no cutting required

our rear diffuser is manufactured using the high quality prepreg carbon fiber and is a quick and easy install that requires no modifications to the AMG GT 4-Door's rear bumper or underbody

the module can be unplugged and the screen goes back to the regular Mercedes menu

and upgraded bearings the M256 Turbo upgrade is engineered to handle and deliver maximum power and torque

Rated by RENNtech (peak @crank):             745  HP @ 6

RENNtech Porsche ECU Upgrade 997 GT3 (435 HP / 314 LB-FT) hsm no cutting requiredRENNtech Porsche ECU Upgrade 997 GT3. Up to 435HP and 314TQ. Gains: +20HP & 15TQ Our proprietary Porsche ECU upgrade offers rock solid performance from RENNtech, the foremost tuning authority on Bosch and Siemens engine control units. These same units are utilized in Mercedes Benz vehicles, which RENNtech has been tuning since electronic engine management started to show up in vehicles during the mid 1980's, though our proprietary tuning software and