I was kind of going along with this "Dimple" thing until I read this....and I quote....
"With an O Ring seal that does not ever have to be replaced. Guaranteed not to leak".....
Is there a soul out there anywhere that knows of an "O" ring that
"NEVER" has to be replaced??? It's rubber, All "O" rings eventually have to be replaced. Another thing to ponder, I can't answer this but is there a relief machined in the female threaded boss in in the engine and oil tank for the "O" ring to be pressed into... If not you could easily crush a rubber "O" ring if you torque the drain plugs to specs. I think I will stick with the $9.99 X 2...plug with the metal washer....that would be about $20 bucks on my calculator and Lamont has already shown that the magnets are approxmately the same strength. Hmmm $20 vs. $60.... Len