Speaker 1: Today we're we're going to take a look at the Kats Heaters, 120 volt, Custom Engine Block Heater, and this one is the frost plug style. Now this one ensures smoother startups, faster heating and defrosting of your cab. It does replace the frost plug or the core plug that's in your engine block and submerges in the coolant. This will warm your engine fluid to increase… see more >