RENNtech ECU Upgrade for C 350 | W204 | 290 HP / 278 LB-FT | MY2008-2011 mercedes-benz-sl-class--230---2007-2011--sl65-amg-black-series-esr3902223 Our transmission upgrade consists of

Our transmission upgrade consists of a complete transmission disassembly and inspection as well as a mechanical upgrade to the transmission clutch packs

CLASS S (W 220) 500 V8 4-matic [5 gear] [2 Filters Required] (HP: 306 | Year: 98 > 03)

Our performance downpipe has been developed specifically for the CLA 45 to maximize exhaust gas flow

The net result is more effective cylinder scavenging

RENNtech ECU Upgrade for C 350 | W204 | 290 HP / 278 LB-FT | MY2008-2011 mercedes-benz-sl-class--230---2007-2011--sl65-amg-black-series-esr3902223 Our transmission upgrade consists ofRENNtech ECU Upgrade for 203 C 350. 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 software for