RENNtech ECU Upgrade for CLK 350 C209 | 290 HP / 278 LB-FT | MY2006-2009 mercedes-benz-sl-class--231---2012-2016--sl-400-biturbo-esr7262269 ECU+ Upgrade | Up to

ECU+ Upgrade | Up to 773 HP / 778 LB-FT | Gains: +82 HP & +84 LB-FT

590 LB-FT @ 2

000 RPM delivering peak gains of +194 HP and +135 LB-FT without sacrificing traction and drivability in the lower RPM range

395 LB-FT @ 3000 RPM

RENNtech ECU Upgrade for CLK 350 C209 | 290 HP / 278 LB-FT | MY2006-2009 mercedes-benz-sl-class--231---2012-2016--sl-400-biturbo-esr7262269 ECU+ Upgrade | Up toRENNtech ECU Upgrade for 209 CLK 350 AMG, up to 290HP, 278LB FT. Gains: +22HP & 20LB 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