RENNtech ECU Upgrade | R231 | SL 550 | 500HP / 625LB-FT | 4.7L V8 BiTurbo | M278 porsche-911--991-1---2011-2016--turbo-esr5301476 To start logging data

To start logging data

-High strength to weigh ratio

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The maximum power number reached with the RENNtech ECU+ Upgrade for the C205 - C 63 AMG Coupe is up to 601 HP and 657 LB-FT

RENNtech ECU Upgrade | R231 | SL 550 | 500HP / 625LB-FT | 4.7L V8 BiTurbo | M278 porsche-911--991-1---2011-2016--turbo-esr5301476 To start logging dataECU Upgrade 500HP 625LB FT Gains: +52HP +87LB FT Our intermediate level ECU upgrade for the Mercedes M278 engine still offers huge gains in performance across the entire RPM range, but with a slightly reduced peak HP and torque from our standard tune. This is ideal for customers who want increased performance in their daily driver without worry of extra strain on driveline components or for areas and countries with extreme altitudes, temperatures or