001 inch. The O-ringing process is quite simple: A groove that’s aligned with the head gasket’s fire ring is cut in the face of the head, and then a stainless steel wire is inserted in the groove.

But cutting O-ring receiver grooves and installing the O-ring wire in the block or heads is an expensive, labor-intensive task. There is no going back to a conventional solution once the parts are ...

001 inch. The O-ringing process is quite simple: A groove that’s aligned with the head gasket’s fire ring is cut in the face of the head, and then a stainless steel wire is inserted in the groove.