RENNtech ECU+ Upgrade | C216 | CL 550 | 540HP / 705 LB-FT| 4.7L V8 BiTurbo | M278 | MY2011-2014 bentley-flying-spur--2020-present--4-0l-v8-tfsi-esr8250520 AMG GT Black Series Owners:

AMG GT Black Series Owners:

the EVM is programmed so once the exhaust valves stay fully open in Position 1 (Button 1)

CLS 63 AMG (C218 | MY2014 | 4MATIC | M157 | 5

Titanium lug bolts are an optional upgrade for this wheel

RENNtech ECU+ Upgrade | C216 | CL 550 | 540HP / 705 LB-FT| 4.7L V8 BiTurbo | M278 | MY2011-2014 bentley-flying-spur--2020-present--4-0l-v8-tfsi-esr8250520 AMG GT Black Series Owners:ECU+ Upgrade 540HP 705LB FT Gains: +92HP +167LB FT 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 the ECU. Programming takes only a few minutes and the vehicle can be