RENNtech Porsche 997 Carrera S (3.8L DFI) ECU Upgrade (365 HP / 300 LB-FT) mercedes-benz-clk-class--208---1997-2003--clk-55-amg-esr2755074 designed to elevate both performance

designed to elevate both performance and style

- Rigid grill mesh mount system for protection

Our R1 Performance Upgrade Package for the 203 C32 AMG features our proprietary ECU upgrade

CLASS S LONG (W 221) 500 [ONLY USA] [2 Filters Required] (HP: 387 | Year: 05 >)

0L Inline-6 EQBoost

RENNtech Porsche 997 Carrera S (3.8L DFI) ECU Upgrade (365 HP / 300 LB-FT) mercedes-benz-clk-class--208---1997-2003--clk-55-amg-esr2755074 designed to elevate both performanceRENNtech Porsche 997 Carrera S (3. 8L DFI) ECU Upgrade. Up to 396HP and 320LB FT. Gains: +11HP & +10LB 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