RENNtech | ECU+ Upgrade | C63 /S AMG | Sedan | W205 | 601 HP / 657 LB-FT | 4.0L BiTurbo V8 | M177 | MY2015-2021 mercedes-benz-sl-class--231---2012-2016--sl-550-biturbo-esr8160914 750rpm Note: Mercedes M176 engine

750rpm Note: Mercedes M176 engine performance when measured on the dyno obtains higher power numbers than rated from factory

The RENNtech AMG GT63 Side Skirts feature unique design elements with strategically formed surfacing and a shaped to improve airflow while enhancing the AMG GT63's dynamic aesthetics

Rated by RENNtech:                416 HP @ 5

RENNtech HHT ECU Upgrade for 197 - SLS AMG GT

222 - S 63 AMG BiTurbo

RENNtech | ECU+ Upgrade | C63 /S AMG | Sedan | W205 | 601 HP / 657 LB-FT | 4.0L BiTurbo V8 | M177 | MY2015-2021 mercedes-benz-sl-class--231---2012-2016--sl-550-biturbo-esr8160914 750rpm Note: Mercedes M176 engineECU+ Upgrade 601HP 657TQ Gains: +56HP +107TQ 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 vehicles stock file. The module plugs directly into the OBD2 port and delivers the file you choose directly to