Engine Block Heaters keep the engine warm for easier starting and quicker warm-up. Features include special plug-in wiring designed for each application and is the same as the production heaters. Designed for the Hemi Engine there is no soft plug to remove. You simply Bolt the heating unit in place and carefully run the wiring to the front of your truck and you are in business. This Kit includes simple to follow instructions and all the necessary mounting hardware to install your block heater.