Anyone know off hand what thread size and pitch these are? My local dealer has a habit of stuffing it in people's asses for parts, so if i could find some studs/nuts at the local supply house, i know it'll be much easier. I'm assuming they aren't the typical 3/8" header bolts like everything else on the planet, right?

 

You wont want to use hardware bolts for this. The GM stuff is high quality, high grade that won't break with the heat. Also the nuts are triangular in shape so they lock down real tight and dont come lose. Even at full retail I think I paid $43 for the nuts and bolts but that's not bad considering ARP's set is $100

 

yep, I think I paid right around there ($43) for all my stuff shipped, gmpartsdirect.com.

 

superchargedss,did you get an eta when you ordered them.....i recently ordered mine but no response on how long it will be before i receive them.i hope its not a back order type of thing

 

Well, to answer my own question, they're 8mm x 30mm. The bolts that came with my LPPs were 5mm too long (and only 4.8 grade) I went to my hardware store and got a set of nice 10.4 grade bolts to use, since they didnt have any studs, but they ended up being too long. I bought the new ones based on the bolts that came with the headers, rather than the stock ones, and come to find out the stock ones are 30mm and the ones i had were 35mm and bottomed out before they tightened down. Ended up re-using the stock bolts. But i thought i'd throw out what the actual size was in case anyone used the search button to try to find out like I did.

 

Old thread, but i just got my studs today, and mine have a space in the middle thats not threaded. just figured the whole stud would be threaded, is this how everybody elses look??
Doesnt look like theres very much stud to go in the head..

 

Yep, that's how mine looked too. No problems though. You can kind of see it here.

 

yep thats how they look. those nuts with the triangle locking stuff are a bitch to get on, mighty tight which i guess is a good thing for keeping them tight..

 

Mine are that way as well.

 

geez what are you a photo major?
i was just wondering cause it doesnt look like enough thread for the head imo but i guess it is..