RENNtech | ECU Upgrade | W166 | ML 350 BlueEFFICIENCY | 308HP/285LB-FT | 3.5L V6 NaturallyAspirated | M276 porsche-cayenne--9ya---2018-present--cayenne-turbo-s-e-hybrid--2019-2023--esr9445743 221 - S 63 AMG

221 - S 63 AMG BiTurbo

Custom Renderings of your car in individual car color

Intermediate ECU Upgrade | Up to 638HP / 695LB-FT | Gains: +33HP & +25LB-FT

our rear diffuser is manufactured using the high quality prepreg carbon fiber and is a quick and easy install that requires no modifications to the SLS’s rear bumper or underbody

Dyno measured by RENNtech (peak):               681 HP @ 6

RENNtech | ECU Upgrade | W166 | ML 350 BlueEFFICIENCY | 308HP/285LB-FT | 3.5L V6 NaturallyAspirated | M276 porsche-cayenne--9ya---2018-present--cayenne-turbo-s-e-hybrid--2019-2023--esr9445743 221 - S 63 AMGRENNtech ECU Upgrade for 166 ML 350 BlueEFFICIENCY. up to 308HP and 285LB FT. Gains: +6HP & +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