My header bolts are 3/4" long.
They work just fine with my AFR cylinder heads.
I do believe that ARP is the manufacturer.

 

Seems to me johnpro had an issue like this.

You might do a search.......I don't recall the outcome.

 

No it won't...

 

uhm, I retracted my problem. I was told that the bolts were bottomming out by my helper, and posted about it before checking it out for myself *LOL*

My helper was really feeling the resistance of the copper header gaskets, not the end of the bolt hole. I'm using 3/4" Stage 8 header bolts with Hooker Comps and AFR 185's ... they work pefect.

 

haha. John you're being diplomatic. In all honesty, the helper was 70sportsroof. Hey, it was late at night anyway and you needed to stop and get some sleep. I just made up the bottoming out story to get you to quit for the night. :joker: (yeah, right! ! ! and I've got a mint KR500 I bought off ebay for $1,500.) Well, anyway, that's my story today.
:lol: :lol: :lol:

 

:lol:

In all honesty, I thought they were bottomming out, too. If you recall, I even measuered one of the bolt holes that night and you and I agreed that the 3/4" bolts wouldn't work. It wasn't until the next day when I realized that no one makes a header bolt shorter than 3/4" that I took a second look and discovered we were both just too tired that night.

So I was partially being diplomatic, partially trying to save face, but mostly too lazy to type all that. :rofl: