New top quality 1000w heavy machined steel & nickel chrome plated block heater. Offers subzero starting capability for 5.9Lengines. Fits all 1987-2002 3.9 & 5.9L Cummins diesel engines in any vehicle..... Pickup trucks & towtrucks. Made by the OEM manufacturer for dodge/ram. This powerhouse heater can be a hard to find part ..... And worth every penny in a cold climate. This is the most powerful and durable block heater available for the 5.9 Cummins diesel. Superior performance as compared to the 600w heaters available from the factory and elsewhere on the web. The longer and more powerful copper heating element and solid heavy cast steel, nickel chrome plated base casting are just some of what sets this heater apart from the cheap imitators. Made for us right here in the good 'ol usa, not china! Not a flimsy stamped metal part ... Solid metal, and nickel chrome plated for longevity & anti corrosion. Includes a new heavy gauge 6' power cord for 120v ac and detailed installation instructions. Replace an old heater... Or install in an engine that never had one. A must for smooth safe engine starting in the cold. Standard mounting position for the 1989-2001 3.9 & 5.9 Cummins Diesel Engine is in the Right side center core plug hole. Also replaces old Mopar block heater with LR1843 marking. (We also offer the Cummins 5.9L block heater as a separate listing).