RENNtech ECU Upgrade | W166 | ML 550 | 480HP / 605LB-FT | 4.7L V8 BiTurbo | M278 bentley-flying-spur--2020-present--4-0l-v8-tfsi-esr8250520 Up to 435HP and 314TQ

Up to 435HP and 314TQ

RENNtech’s one piece front splitter flows seamlessly into the front apron and is a simple

Note: This upgrade requires a core exchange for the OEM airbox

giving you complete control over the exhaust sound regardless of speed

RENNtech Pre-Preg Carbon Fiber Rear Decklid Spoiler for all 230 - SL Class Models | Gloss Finish

RENNtech ECU Upgrade | W166 | ML 550 | 480HP / 605LB-FT | 4.7L V8 BiTurbo | M278 bentley-flying-spur--2020-present--4-0l-v8-tfsi-esr8250520 Up to 435HP and 314TQECU Upgrade 480HP 605LB FT Gains: +32HP +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