RENNtech ECU+ Upgrade | W212 | E63 AMG | Sedan | 669 HP / 734 LB-FT | M157 | 5.5L V8 BiTurbo | MY2012-13 rpm Combined with RENNTECH's ECU software

Combined with RENNTECH's ECU software our S 63 down pipes create an incredible sound with performance to match

RENNtech ECU Upgrade for 230 - SL 550

Gains: +39HP & +20LB-FT

countless hours of in house research

Gains: +18HP & +16LB-FT

RENNtech ECU+ Upgrade | W212 | E63 AMG | Sedan | 669 HP / 734 LB-FT | M157 | 5.5L V8 BiTurbo | MY2012-13 rpm Combined with RENNTECH's ECU softwareECU+ 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