RENNtech | ECU+ Upgrade | C63 /S AMG | Coupe | C205 | 601 HP / 657 LB-FT | 4.0L BiTurbo V8 | M177 | MY2017-2023 performance-part In order to make the

In order to make the extractors fully functional

CLS 400 BiTurbo (C218 - M276 Biturbo 4-MATIC Engine) Modified Performance:

217 - S 63 AMG Coupé BiTurbo

With the proprietary RENNtech ECU Plus Upgrade the W166 - GLE AMG SUV gains up to +41 HP and +62 LB-FT

Rated by RENNtech:              670 HP @ 5

RENNtech | ECU+ Upgrade | C63 /S AMG | Coupe | C205 | 601 HP / 657 LB-FT | 4.0L BiTurbo V8 | M177 | MY2017-2023 performance-part In order to make theECU+ Upgrade 601HP 657TQ Gains: +56HP +107TQ RENNtech tuning products are certified to meet CARB standards in all 50 States. 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