RENNtech R3 Performance Package | GLS 63 (S) AMG | X167 | 875 HP / 873 TQ | 4.0L V8 BiTurbo | M177 | MY2021+ mercedes-benz-cl-class--216---2007-2014--cl-550-esr7736410 Rated by RENNtech: 421 HP

Rated by RENNtech:               421 HP @ 5

RENNtech ECU Upgrade

0L I6 Turbo EQ Boost | Up to 494 HP / 480 LB-FT | Gains: +59 HP & +97 LB-FT

RENNtech | C190 | R190 |  AMG GT R / Pro -series | Side Skirts | Carbon Fiber |

RENNtech R3 Performance Package | GLS 63 (S) AMG | X167 | 875 HP / 873 TQ | 4.0L V8 BiTurbo | M177 | MY2021+ mercedes-benz-cl-class--216---2007-2014--cl-550-esr7736410 Rated by RENNtech: 421 HPR3 Performance Package for Mercedes AMG GLS 63: ECU Upgrade (HHT), Stage 1 Turbo Upgrade, TCU, CPC, Fuel Management System, BOV, EVM, BMC Air Filters The Mercedes AMG GLS 63 (X167) is powered by the latest V8 BiTurbo engine developed by AMG, the companys Affalterbach based performance division and long fabled engine builder. The result is nothing short of spectacular and the 4. 0L V8 BiTurbo engine is an incredible platform to build performance upon.