RENNtech ECU+ Upgrade | R231 | SL 63 AMG | 669 HP / 734 LB-FT | M157 | 5.5L V8 BiTurbo lamborghini-urus--2018-present--4-0l-v8-fsi-twinturbo-esr5300432 up to an astonishing 669

up to an astonishing 669 HP and 734 lb/ft at the crank

Street-Legal and/or Non-Performance tires

Dyno measured by RENNtech (peak @crank):          339 HP @ 5

With the newest update of their Software Upgrade for the M278 – 4

2 | GT3 RS (OPF)

RENNtech ECU+ Upgrade | R231 | SL 63 AMG | 669 HP / 734 LB-FT | M157 | 5.5L V8 BiTurbo lamborghini-urus--2018-present--4-0l-v8-fsi-twinturbo-esr5300432 up to an astonishing 669ECU+ Upgrade Up to 669HP 734TQ Gains: +65 HP +55TQ 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