RENNtech ECU+ Upgrade | R231 | SL 63 AMG | 669 HP / 734 LB-FT | M157 | 5.5L V8 BiTurbo mercedes-benz-sls-amg--197---2011-2014--sls-black-series--2014--esr5166974 RENNtech ECU HHT (HandHeldTuner) for

RENNtech ECU HHT (HandHeldTuner) for the C215 - CL55 AMG Kompressor

The maximum power number reached with the RENNtech ECU Upgrade for the S63 AMG S 4MATIC+ is 740 HP and 806 LB-FT

E53 AMG Sedan | MY2019+ | *Needs to be equipped with optional performance exhaust/factory valves*

Our RENNtech - Rtic Tumblers come with Laser Edged Rt Motorsports and RENNtech Logos

RENNtech ECU+ Upgrade | R231 | SL 63 AMG | 669 HP / 734 LB-FT | M157 | 5.5L V8 BiTurbo mercedes-benz-sls-amg--197---2011-2014--sls-black-series--2014--esr5166974 RENNtech ECU HHT (HandHeldTuner) forECU+ Upgrade Up to 669HP 734TQ Gains: +65 HP +55TQ 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