RENNtech ECU+ Upgrade | GL 550 | BiTurbo 4.7L V8 | X166 | 540 HP / 705 LB-FT | M278 Engine

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RENNtech ECU+ Upgrade | GL 550 | BiTurbo 4.7L V8 | X166 | 540 HP / 705 LB-FT | M278 EngineECU+ 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

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Gains: +114HP & +100LB-FT

Rated by Mercedes-Benz: 396 HP @ 6

0L V8 BiTurbo) Stock Performance (at crank):

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493 HP @ 5000 RPM

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Advantages of RENNtech’s EVM:

Exchange/Return Notes