RENNtech ECU+ Upgrade | C217 | S 63 AMG | Coupe | 669 HP / 734 LB-FT | M157 | 5.5L V8 BiTurbo | MY2015-2017 ferrari-ff--2011-2016--esr7021482 Stock: 464 HP | 424

Stock: 464 HP | 424 LB FT

582 LB-FT @ 5

Porsche Carrera

S560 Maybach

easy to read numbers in all lighting conditions and features a white illuminated background for low lighting

RENNtech ECU+ Upgrade | C217 | S 63 AMG | Coupe | 669 HP / 734 LB-FT | M157 | 5.5L V8 BiTurbo | MY2015-2017 ferrari-ff--2011-2016--esr7021482 Stock: 464 HP | 424ECU+ Upgrade Up to 669HP 734LB FT Gains: +65HP & +55LB 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