header bolt
M8x1.25x30 is the size, get one at a hardware store. If it doesn't have the same head/lip on it, stick it toward the back where nobody will see it. 
Here's where I found the size, search is your friend.
https://ls1tech.com/forums/generation-iii-external-engine/531999-header-bolt-size-thread.html
Here's where I found the size, search is your friend.
https://ls1tech.com/forums/generation-iii-external-engine/531999-header-bolt-size-thread.html
I had called my local dealership as well looking for the header bolts, and they found the part number, but wanted something like $7/bolt for them. For that price, you're better off buying ARP studs for $80 a set.
Originally Posted by TheBlurLS1
M8x1.25x30 is the size, get one at a hardware store. If it doesn't have the same head/lip on it, stick it toward the back where nobody will see it.
Here's where I found the size, search is your friend.
https://ls1tech.com/forums/showthread.php?t=531999
Here's where I found the size, search is your friend.
https://ls1tech.com/forums/showthread.php?t=531999
Originally Posted by The Alchemist
I had called my local dealership as well looking for the header bolts, and they found the part number, but wanted something like $7/bolt for them. For that price, you're better off buying ARP studs for $80 a set.
