RENNtech Porsche 997 Carrera (3.6L DFI) ECU Upgrade (365 HP / 300 LB-FT) mercedes-benz-s-class--222---2014-2017--s500-maybach-esr3807363 X290 - GT 63 S

X290 - GT 63 S AMG 4-Door Coupe

3 at 5850 rpm + 20

RENNtech ECU HHT (HandHeldTuner) for the 230 - SL 600

Improved response

RENNtech Porsche 997 Carrera (3.6L DFI) ECU Upgrade (365 HP / 300 LB-FT) mercedes-benz-s-class--222---2014-2017--s500-maybach-esr3807363 X290 - GT 63 SRENNtech Porsche 997 Carrera (3. 6L DFI) ECU Upgrade. Up to 365HP and 300LB FT. Gains: +20HP & +12LB FT 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