RENNtech ECU Upgrade | C207 | E 550 Coupé | 540HP / 705 LB-FT | +105HP / 197LB-FT | 4.7L V8 BiTurbo | M278 | MY2012-2013 mercedes-benz-sl-class--230---2007-2011--sl63-amg-esr5733179 C205 - C63 AMG Coupe

C205 - C63 AMG Coupe

but improves both vehicle handling and performance

the ML 550 gains up to 92 HP and 167 LB-FT

Rolls Royce Wraith (MY2013+ | N74 | 6

211 - E 55 AMG Kompressor

RENNtech ECU Upgrade | C207 | E 550 Coupé | 540HP / 705 LB-FT | +105HP / 197LB-FT | 4.7L V8 BiTurbo | M278 | MY2012-2013 mercedes-benz-sl-class--230---2007-2011--sl63-amg-esr5733179 C205 - C63 AMG CoupeRENNtech ECU Upgrade for 207 E 550 Coupe BiTurbo. Up to 540HP and 705 LB FT. Gains up to 105 HP and 192 LB 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.