No,but they're put in with a hydraulic....pop rivit gun would be the best description I could give you. Fun Buggies in Grand Rapids, Michigan did the ones in my VW's heads. They're neat because they won't ever pull out like a heli-coil and you can salvage heads that are too stripped out to accept a heli-coil. Al Groendyke runs the place, his phone number is 1-800-356-5571.
Re: Now I did it!
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