Normally when there are block heater issues the problem is the 3-prong cord 98% of the time. Unfortunately, the coil itself in my truck had gone bad after 25 years. RiffRaff had the OE coil in stock and my F-250 actually starts in the winter again.

Same comments as everybody else. I wasted money on a cheap imitation and it worked great, ONCE. LOL. Count on RiffRaff for quality.

Its a block heater, installed and plugged in. Works and was the correct fit.

Only used the blocker for a few weeks but the truck is warmer than ever after that first start. Coolant bath was minimal during instal. Didn’t need to top any coolant off after either. Was a little gun shy due to it being below freezing outside. Not bad at all just be quick when switching out. KMA 25 rolling out

Great product, great pricing and fast shipping.

Put this on with a new cord from Riffraff after rebuilding my oil cooler. I like that it already has threadlocker on it. Fantastic quality, functions perfectly. My truck bellows white smoke for a couple few minutes if I start it when it's chilly outside. But with this new block heater, not a single puff. Truck's warm when I start it so I can let it sit for ten minutes with the heat on before I go anywhere and it's nice and toasty inside too.

All around very pleased cant say enough about riffraff whenever I need something for my 7.3 they are my go to everytime. Nothing but good things to say riffraff my go to for all and everything for 7.3 powerstroke

Excellent in OEM Motorcraft box and was genuine part. Works perfect and easy install

It arrived quickly, I think before it was estimated to. It is a quality part and installed easily. I like Riff Raff diesel for their good prices and quick shipping.