RENNtech ECU Upgrade | C207 | E 550 Coupé | 540HP / 705 LB-FT | +105HP / 197LB-FT | 4.7L V8 BiTurbo | M278 | MY2012-2013 porsche-911--992---2018-present--911-sport-classic-esr4784284 CLASS C SW (S 204)

CLASS C SW (S 204) 63 AMG Performance [2 Filters Required] (HP: 487 | Year: 09 > )

209 - CLK 63 AMG

RENNtech ECU Upgrade for 463 - G 65 AMG

E 550 (W211) Stock Performance:

CLASS S LONG (W 221) 500 Blue Efficiency 4-matic [2 Filters Required] (HP: 435 | Year: 11 > )

RENNtech ECU Upgrade | C207 | E 550 Coupé | 540HP / 705 LB-FT | +105HP / 197LB-FT | 4.7L V8 BiTurbo | M278 | MY2012-2013 porsche-911--992---2018-present--911-sport-classic-esr4784284 CLASS C SW (S 204)RENNtech 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.