RENNtech ECU+ Upgrade | W212 | E63 AMG | Sedan | 669 HP / 734 LB-FT | M157 | 5.5L V8 BiTurbo | MY2012-13 rpm RENNtech ECU Upgrade for 230

RENNtech ECU Upgrade for 230 - SL 550

Up to 536HP and 552LB-FT

Gains: +18HP & +16LB-FT

The pre-impregnated (prepreg) fiber method creates stiffer

Crank Performance Numbers are calculated with a 14% Drivetrain loss on RWD vehicles

RENNtech ECU+ Upgrade | W212 | E63 AMG | Sedan | 669 HP / 734 LB-FT | M157 | 5.5L V8 BiTurbo | MY2012-13 rpm RENNtech ECU Upgrade for 230ECU+ Upgrade Up to 669HP 734TQ Gains: +119HP +190TQ 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