RENNtech ECU Upgrade CLK 430 W208 | 285 HP / 307 LB-FT | MY1999-2002 ecu RENNtech is able to add

RENNtech is able to add up to 253 HP and 232 LB-FT to the 5

3 Series CABRIOLET (E93) M3 V8 (FOR USA MARKET ONLY) (HP: 420 | Year: 08 > 09)

Note: Mercedes M137 engine performance when measured obtains higher numbers that rated from factory

Combined with RENNTECH's ECU software our CL 63 down pipes create an incredible sound with performance to match

RENNtech ECU Upgrade CLK 430 W208 | 285 HP / 307 LB-FT | MY1999-2002 ecu RENNtech is able to addRENNtech ECU Upgrade for 208 CLK 430, up to 285HP, 307LB FT. Gains: +10HP & 12LB FT 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 reliability. RENNtech tuning software