Anyone use Stage 8 Header bolts

[kcc0521]

I am planning to install my ARH long tubes and I was thinking about picking up a set of stage 8 locking header bolts. I am concerned about the bolts backing off since they are so hard to get to after putting the car back together. Has anyone used stage 8 bolts on their 15 mustang?

http://www.summitracing.com/parts/stg-8914/overview/

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[Slamdcoop0428]

You don't really need them. Nice to have but its up to you.