RENNtech ECU Upgrade | R172 | SLC 43 AMG | 400 HP / 440 LB-FT | M276 | 3.0L V6 BiTurbo | MY2016-2020 mercedes-benz-cls-class--218---2011-2014--cls63-amg-biturbo-esr5204476 turbulence is further reduced

turbulence is further reduced

62 AWHP / 582

BMC Air Filters: BMC air filters are designed to last longer and create more power than the OEM paper filters

5 Series TOURING (E61) 525 i/Xi (HP: 218 | Year: 05 > 07)

RENNtech ECU Upgrade | R172 | SLC 43 AMG | 400 HP / 440 LB-FT | M276 | 3.0L V6 BiTurbo | MY2016-2020 mercedes-benz-cls-class--218---2011-2014--cls63-amg-biturbo-esr5204476 turbulence is further reducedThe 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