RENNtech Intermediate ECU Upgrade - E 550 Coupe BiTurbo | C207 | 480HP/523 LB-FT | M278 Engine | MY2012-2013 mercedes-benz-sl-class--230---2007-2011--sl-600-esr9561245 and faster shifting times

and faster shifting times

774 LB-FT @ 3

Our freer flowing muffler weighs in at a scant 13 lbs per side with 100 cell catalytics versus the factory mufflers which weigh in at a hefty 60 lbs per side

Porsche Carrera

RENNtech Intermediate ECU Upgrade - E 550 Coupe BiTurbo | C207 | 480HP/523 LB-FT | M278 Engine | MY2012-2013 mercedes-benz-sl-class--230---2007-2011--sl-600-esr9561245 and faster shifting timesRENNtech Intermediate ECU Upgrade for 207 E 550 BiTurbo. Up to 480HP and 523 LB FT. Gains: +78HP & +80 LB 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