RENNtech ECU Upgrade | GL 550 | X166 | 480HP / 605LB-FT | 4.7L BiTurbo | M278 Engine mercedes-benz-gle-class--166---2016-2020--gle-63-amg-esr4679580 SL 65 (R231) Stock Performance:

SL 65 (R231) Stock Performance:

and enhanced overall driving dynamics without the need for a complete coilover conversion

Current Consumption: 30mA (60mA while plugged in to PC/Tablet)

These splitter is designed to fit the AMG GT63 (S)

we are able to supply the engine with more boost pressure in order to gain higher HP numbers

RENNtech ECU Upgrade | GL 550 | X166 | 480HP / 605LB-FT | 4.7L BiTurbo | M278 Engine mercedes-benz-gle-class--166---2016-2020--gle-63-amg-esr4679580 SL 65 (R231) Stock Performance:ECU 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