RENNtech ECU Upgrade for SLK 350 | R171 | 290 HP / 278 LB-FT | MY2005-2011 porsche-911--996---1997-2005--turbo-s-esr3373992 Up to 735HP and 836LB-FT

Up to 735HP and 836LB-FT

W205 - C-Class C350e Plug-In Hybrid

6 at 5620 rpm            + 7

CLASS R (W 251) 350 4-matic [2 Filters Required] (HP: 272 | Year: 06 > 11)

RENNtech ECU Upgrade for SLK 350 | R171 | 290 HP / 278 LB-FT | MY2005-2011 porsche-911--996---1997-2005--turbo-s-esr3373992 Up to 735HP and 836LB-FTRENNtech ECU Upgrade for R171 SLK 350. Up to 290HP and 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