RENNtech ECU Upgrade for SLK 350 | R171 | 290 HP / 278 LB-FT | MY2005-2011 porsche-911--996---1997-2005--turbo-s-esr3373992 With the proprietary RENNtech ECU

With the proprietary RENNtech ECU Tuning the W222 - Mercedes-Maybach S560 gains up to +100 HP and +102 LB-FT

W205 - C-Class C350e Plug-In Hybrid

Up to 735HP and 836LB-FT

520 LB-FT @ 2

RENNtech ECU Upgrade for SLK 350 | R171 | 290 HP / 278 LB-FT | MY2005-2011 porsche-911--996---1997-2005--turbo-s-esr3373992 With the proprietary RENNtech ECURENNtech 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