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Originally Posted by davidlee
I have used Stage 8 header bolts on my (former) 351 Backdraft. If I remember correctly I had to do a little grinding on a few of the hex washers to allow them to clear the header pipe. Other than that they worked great and I never had any problems with them backing out. I would use them again if I build another Cobra.
David
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I had to grind some of the hex washers too, I also used some Loc-Tite on the bolts.