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  1. #1
    imp0ster's Avatar
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    What is the ARP head stud nut socket?

    thought it was a large torx but here I am with my thumb up my ass trying to put the head on.


  2. #2
    Eric Ocman's Avatar
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    Re: What is the ARP head stud nut socket?

    12-pt. 1/2. Picked me up a 3/4 one at Sears.

  3. #3
    imp0ster's Avatar
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    Quote Originally Posted by Ocman View Post
    12-pt. 1/2. Picked me up a 3/4 one at Sears.
    1/2" 12pt star?

  4. #4
    Eric Ocman's Avatar
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    Re: What is the ARP head stud nut socket?

    I think they call it star yes. If you have a tool place you should be gtg.

  5. #5
    imp0ster's Avatar
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    it was a 9/16 12pt. 1/2 is the only way to go. 3/8 runs the risk of cracking at 100ft/lbs of torque. Ask me(my thumb and pointer finger knuckle) how I found that out in the past 10 minutes

  6. #6
    Fast & Loud meeper's Avatar
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    its a 12 point 1/2" not a star and the stud is allen key

  7. #7
    Eric Ocman's Avatar
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    Re: What is the ARP head stud nut socket?

    Quote Originally Posted by meeper View Post
    its a 12 point 1/2" not a star and the stud is allen key
    Knew it was a 12pt 1/2. Didn't know what the heck star meant lol.

  8. #8
    GGG's Avatar
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    I don't think stars have 12 points unless its a double star of david

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