RENNtech Intermediate ECU Upgrade | X253 | GLC63 AMG (S) 4MATIC+ SUV | 574 HP/612LB-FT | 4.0L V8 BiTurbo | M177 | MY2016-2022 bentley-flying-spur-speed--2022-2024--6-0l-w12-tsi-esr8340154 Note: The TCU upgrade included

Note: The TCU upgrade included with AMG GT -series Turbo upgrades and is recommended for all AMG GT -series vehicles with ECU tune

Eliminates the spongy feel

That is a reduction in weight of 100 pounds across the front of the vehicle versus the stock system

RENNtech Stainless Steel Sport Mufflers w/Eclectronic Valves for the C205 - C63 AMG Coupe BiTurbo

due to the adjustments to the electronic OEM diverter valves

RENNtech Intermediate ECU Upgrade | X253 | GLC63 AMG (S) 4MATIC+ SUV | 574 HP/612LB-FT | 4.0L V8 BiTurbo | M177 | MY2016-2022 bentley-flying-spur-speed--2022-2024--6-0l-w12-tsi-esr8340154 Note: The TCU upgrade includedIntermediate 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