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 The RENNtech AMG GT63 Side

The RENNtech AMG GT63 Side Skirts feature unique design elements with strategically formed surfacing and a shaped to improve airflow while enhancing the AMG GT63's dynamic aesthetics

Our proprietary Rolls Royce ECU upgrade offers rock solid performance from RENNtech

Porsche Carrera

The dual-mode ECU-controlled valve exhaust from Akrapovič offers stock-level sound at normal cruising

This entire cartridge is then fine balanced as a complete assembly to safely allow for these increases

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 The RENNtech AMG GT63 SideRENNtech 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