If you've ever put in a helicoil and it failed, is wasn't a Time-Sert. These are over sized, if you repaired your blown spark plug hole and it leaked or something, this is the fix. Serts are M=14 size I.D.
Kit #5141s-457 with helicoils. I used two in the kit and it's lived on a shelf for years. I won't be needing it. I paid $450 for it, yours for $200 + shipping.
