Original plug that gets removed if installing an oil crossover tube, and put back in place if deleting the aftermarket cross over tube.

Rebuilding 7.3 engines having a resource like Raffraff to get parts like these is invaluable!

Had a HPOP crossover that wouldn't fit with the T4 kit I am installing. Needed these to block off the oil ports in the head. Fit like an original part, I guess because it is an original part, hah!

If you've ever had the drain plug leak, it's definitely an annoying inconvenience. The plug threaded in quick an easy an seems to be holding solid.

Just taking the old plugs out and swapping in the new, one at a time went a lot smoother and with less oil running out all over my engine than just changing the orings. Certainly worth the few extra bucks in price difference.