RENNtech ECU Upgrade | X166 | GLS 550 | 500HP / 605LB-FT | 4.7L V8 BiTurbo | M278 mercedes-benz-ml-class--164---2006-2011--ml-550-esr3202973 RENNtech Stainless Steel Downpipes w/200

RENNtech Stainless Steel Downpipes w/200 Cell Catalytic Converters

0-liter BiTurbo V8 -engine (M177) found in the Mercedes-AMG SL-series of vehicles

The peak Torque increase is up to +100 LB-FT over stock and up to +34 LB-FT over our ECU Upgrade

RENNtech ECU Upgrade for 166 - GL 450 BiTurbo

ECU+ Upgrade | Up to 843 HP / 739 LB-FT | Gains: +99 HP & +95 LB-FT

RENNtech ECU Upgrade | X166 | GLS 550 | 500HP / 605LB-FT | 4.7L V8 BiTurbo | M278 mercedes-benz-ml-class--164---2006-2011--ml-550-esr3202973 RENNtech Stainless Steel Downpipes w/200ECU Upgrade 500HP 605LB FT Gains: +26HP +67LB 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