RENNtech Intermediate ECU Upgrade | C253 | GLC63 AMG (S) 4MATIC+ Coupe | 574 HP/612LB-FT | 4.0L V8 BiTurbo | M177 | MY2016-2022 mercedes-benz-s-class-coupe--217---2015-2017--s63-amg-biturbo-esr3084673 0L V8 BiTurbo EQ Boost)

RENNtech Intermediate ECU Upgrade | C253 | GLC63 AMG (S) 4MATIC+ Coupe | 574 HP/612LB-FT | 4.0L V8 BiTurbo | M177 | MY2016-2022 mercedes-benz-s-class-coupe--217---2015-2017--s63-amg-biturbo-esr3084673 0L V8 BiTurbo EQ Boost)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

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