RENNtech ECU Upgrade | W222 | S 550 | 500HP / 625LB-FT | 4.7L V8 BiTurbo | M278 | MY2014-2017 mercedes-benz-slr-mclaren-slr-mclaren-722--2006-2011--esr6133838 up to + 10 HP

up to + 10 HP

CLASS C (W 204) 63 AMG Performance [2 Filters Required] (HP: 457 | Year: 07 > 09)

R2 Performance Package for 209 - CLK 63 AMG

With the proprietary RENNtech ECU Tuning the C292 - GLE 43 AMG Coupe gains up to +25 HP and +42 LB-FT

The RENNtech Lower Control Arm give the best improvment in combinatino with the RENNtech Toe Link Kit

RENNtech ECU Upgrade | W222 | S 550 | 500HP / 625LB-FT | 4.7L V8 BiTurbo | M278 | MY2014-2017 mercedes-benz-slr-mclaren-slr-mclaren-722--2006-2011--esr6133838 up to + 10 HPECU Upgrade 500HP 625LB FT Gains: +26HP +59LB 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