RENNtech ECU Upgrade | W221 | S 550 | 500HP / 625 LB-FT | 4.7L V8 BiTurbo | M278 | MY2011-2013 mercedes-benz-s-class--220---1999-2006--s-55-amg-esr2706700 AMG GT S (C190 |

AMG GT S (C190 | M178 | 4

+114 HP / +160 LB-FT

000 rpm Note: Mercedes M178 engine performance when measured on the dyno obtains higher power numbers than rated from factory

ECU+ Upgrade | Up to 601HP / 582LB-FT | Gains: +65HP & +87LB-FT

Kit Specifications:

RENNtech ECU Upgrade | W221 | S 550 | 500HP / 625 LB-FT | 4.7L V8 BiTurbo | M278 | MY2011-2013 mercedes-benz-s-class--220---1999-2006--s-55-amg-esr2706700 AMG GT S (C190 |ECU 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