BlackBoost Coolant Wide Open Thermostat for Mercedes-Benz S550 (W221) M278 4.7L V8 BiTurbo (2011 – 2013) Polaris RZR Alpinestars includes a micro USB

Alpinestars includes a micro USB charger for quick recharging

These high performance protectors are perforated for maximum breathability and are reduced in thickness to enhance female styling

Reflective panels on the harness and rear logo

Interior: Completely removable and washable

low noise level no matter what speed

BlackBoost Coolant Wide Open Thermostat for Mercedes-Benz S550 (W221) M278 4.7L V8 BiTurbo (2011 – 2013) Polaris RZR Alpinestars includes a micro USBBlackBoost Coolant Wide Open Thermostat for Mercedes Benz S550 (W221) M278 4. 7L V8 BiTurbo (2011 2013) 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