RENNtech | ECU Upgrade | C 450 BiTurbo AMG | W205 | 402HP/454LB-FT | 3.0L V6 | M276 | MY2016 mercedes-benz-sl-class--231---2012-2016--sl-550-biturbo-esr8160914 Dyno measured by RENNtech (peak

Dyno measured by RENNtech (peak @crank): 339 HP @ 5

The RENNtech Stage I Turbo -upgrade package for the Mercedes-Benz M256 -engine was developed to address and prevent possible OEM turbo failures when increasing the power output of the AMG 53 | M256 | AMG 3

Installs in minutes via OBD-II

RENNtech Carbon Fiber Pen

RENNtech | ECU Upgrade | C 450 BiTurbo AMG | W205 | 402HP/454LB-FT | 3.0L V6 | M276 | MY2016 mercedes-benz-sl-class--231---2012-2016--sl-550-biturbo-esr8160914 Dyno measured by RENNtech (peakRENNtech ECU Upgrade for 205 C 450 BiTurbo AMG 4 MATIC. Up to 402HP and 454LB FT. Gains: +40HP & +70LB FT RENNtech M276 Biturbo ECU Upgrades are TV approved! RENNtech tuning products are certified to meet CARB standards in all 50 States. RENNtech HHT (hand held tuner) allows you the unlimited ability to switch between tuned and stock ECU programming and requires no ECU removal! Our proprietary tuning module stores both the RENNtech tuned file and your