RENNtech ECU+ Upgrade | C238 | E450 BiTurbo | 392 HP/463 LB-FT | 3.0L V6 BiTurbo | M276 | MY2019-2020 audi-s7--4g---2012-2018--4-0l-v8-twinturbo-esr9168828 Not just a pretty front

Not just a pretty front facia

Please note that the Mercedes M177 engine performance when measured

Stock: 542 HP | 502 LB-FT

We have found the new M133 engine stock performance numbers vary from the baseline figures claimed by Mercedes Benz

the following states can not be supplied with the full power Upgrade: AZ

RENNtech ECU+ Upgrade | C238 | E450 BiTurbo | 392 HP/463 LB-FT | 3.0L V6 BiTurbo | M276 | MY2019-2020 audi-s7--4g---2012-2018--4-0l-v8-twinturbo-esr9168828 Not just a pretty frontECU+ Upgrade Up to 392 HP 463 LB FT Gains: +53 HP & +78 LB FT RENNtech M276 Biturbo ECU Upgrades are TV approved! 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.