RENNtech Porsche ECU Upgrade 997 GT3 (435 HP / 314 LB-FT) hsm our rear diffuser is manufactured

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 Sport 1 is tailored to fit specific current and late model Mercedes-Benz and AMG vehicles without any modification

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

5 Series TOURING (E61) 530 i/Xi (HP: 258 | Year: 05 > 07)

Installation Guide and Tuning Support

RENNtech Porsche ECU Upgrade 997 GT3 (435 HP / 314 LB-FT) hsm our rear diffuser is manufacturedRENNtech 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