Originally Posted By qwkmopardan
...You can go farther. M/P made a kit with a pair of plugs and 2 of the longer head bolts. Counterbore varys from head to head so I make my own plugs to fit each head perfectly.


I have read stuff about the MP plugs before, but never knew what they were used for...now I do...thanks!

So how do you make your own? What do you use? Is this something you machine, or have someone machine for you?