Calix Block Heater RE 187, 230v, 550w - 1788701Calix Engine Block Coolant Pre Heater Introducing a must have engine block pre heater for engines used in race conditions and applications. This compact, lightweight block pre heater is a direct fit to the rear of the engine and when connected to a mains power source, it heats the engine coolant up to premium operating temperature without the engine running. Reduce unnecessary wear on expensive engine components, which in a highly strung race engine