RENNtech ECU+ Upgrade | GL 550 | BiTurbo 4.7L V8 | X166 | 540 HP / 705 LB-FT | M278 Engine mercedes-benz-gle-class--166---2016-2020--gle-400-esr4461593 while the fit and finish

while the fit and finish meet AMG’s uncompromising standards

Double Wall Vacuum Insulation Maximum temperature retention & insulates hands from the cold

1 x Exhaust Valve Module

our carbon air box is able to offer gains up to +10 hp and + 10 lb/ft of torque

Our intermediate ECU tune increases performance from 556 HP and 550 lb/ft torque to 638 HP and 695 lb/ft at the crank

RENNtech ECU+ Upgrade | GL 550 | BiTurbo 4.7L V8 | X166 | 540 HP / 705 LB-FT | M278 Engine mercedes-benz-gle-class--166---2016-2020--gle-400-esr4461593 while the fit and finishECU+ Upgrade 540HP 705LB FT Gains: +92HP +167LB FT RENNtech HHT (hand held tuner) allows you the unlimited ability to switch between tuned and stock ECU programming and requires no ECU removal! Our proprietary tuning module stores both the RENNtech tuned file and your vehicles stock file. The module plugs directly into the OBD2 port and delivers the file you choose directly to the ECU. Programming takes only a few minutes and the vehicle can be