RENNtech ECU Upgrade | R172 | SLC 43 AMG | 400 HP / 440 LB-FT | M276 | 3.0L V6 BiTurbo | MY2016-2020 mercedes-benz-s-class--s222---2014-2017--s600-esr5127388 592 LB-FT @ 5

RENNtech ECU Upgrade | R172 | SLC 43 AMG | 400 HP / 440 LB-FT | M276 | 3.0L V6 BiTurbo | MY2016-2020 mercedes-benz-s-class--s222---2014-2017--s600-esr5127388 592 LB-FT @ 5The RENNtech ECU Upgrade brings the R172 SLC 43 AMG up to 400 HP and 440 LB FT Gains: +41 HP and +62 LB FT. RENNtech tuning products are certified to meet CARB standards in all 50 States. RENNtech has been at the forefront of ECU tuning since electronic engine management started to show up in vehicles during the mid 1980s! Our experience, countless hours of in house research, development and exhaustive testing ensure that our proprietary ECU upgrade

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