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

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RENNtech ECU+ Upgrade | X166 | GLS 550 | 540HP / 705LB-FT | 4.7L V8 BiTurbo | M278ECU+ Upgrade 540HP 705LB FT Gains: +66HP +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

Not just a simple side skirt

Rated by RENNtech (peak @crank): 258 HP @ 3

Finished in a high gloss UV protectant clear coat

With the proprietary RENNtech ECU Tuning the C190 AMG GT gains up to +95 HP and +131 LB-FT

Stock: 454 HP | 460 LB-FT

X156 - GLA 45 AMG

RENNtech ECU Upgrade for the Mercedes-Maybach 222 - S 600 BiTurbo V12

667 LB-FT @ 2

RENNtech HHT ECU Upgrade for 197 - SLS AMG GT

362 HP @ 5750 RPM

and refined which evolved into our final and optimal solution

Rated by Mercedes-Benz (avg