RENNtech Intermediate ECU Upgrade | X253 | GLC63 AMG (S) 4MATIC+ SUV | 574 HP/612LB-FT | 4.0L V8 BiTurbo | M177 | MY2016-2022 mclaren-mclaren-gt-esr5735104 Rated by RENNtech (peak @wheel):

Rated by RENNtech (peak @wheel):              491 whp @ 5

The complete suspension conversion allows full adjustment without the need to purchase an entire coilover conversion kit and comes with an adjustment tool to make on-the-fly suspension adjustments

Programmable remote control)

Recommended back spacing is between 1 and 2  inches of clearance between wheel/tire and the door

Coupé and Roadster

RENNtech Intermediate ECU Upgrade | X253 | GLC63 AMG (S) 4MATIC+ SUV | 574 HP/612LB-FT | 4.0L V8 BiTurbo | M177 | MY2016-2022 mclaren-mclaren-gt-esr5735104 Rated by RENNtech (peak @wheel):Intermediate ECU Upgrade GLC 63 AMG S and non S Up to 574 HP 612 LB FT Gains: +48 HP & +80 LB FT 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