BlackBoost Coolant Wide Open Thermostat for Mercedes-Benz GLS550 (X166) M278 4.7L V8 BiTurbo (2015 – 2019) Niken After 2 years in the

After 2 years in the making

Vamp in mesh for enhanced comfort and breathability

Silicon print on fingertips for optimized grip with the bike’s controls

Sport-style fit with extended back for greater coverage in the riding situation

With an asymmetric and lightweight design plus strategic flexion channeling

BlackBoost Coolant Wide Open Thermostat for Mercedes-Benz GLS550 (X166) M278 4.7L V8 BiTurbo (2015 – 2019) Niken After 2 years in theBlackBoost Coolant Wide Open Thermostat for Mercedes Benz GLS550 (X166) M278 4. 7L V8 BiTurbo (2015 2019) Racing Coolant Thermostat. With BlackBoost Racing Coolant Thermostat the coolant circulation with the radiator is always at 100% open. The factory coolant thermostat opens at 100C 212F. Only for racing application, not recommended be used under very cold weather conditions. Note : Prior to check out, please click here to confirm product