ARP Head bolt question

[Raptor]

The diameter and nut size is close, but not quite, the stud diameter is 11MM like you said, the factory bolt size uses a 12MM wrench, but the ARP stud in this case uses a 1/2" 12 PT. I wouldn't use a 13mm on it either as they are a hair larger and with a 12 pt at that torque setting, depending on how decent your tools are, you could strip it. I have seen it done with crap tools.

As for the price, there is a definate Jump in price for the 7 bolt, we sell them more for a service if someone needs them and don't make squat off them, the 6 bolts are considerably less money to buy and through the same local src, there is over a $20 difference. Summit buys a ton like AJ Mentioned, they're doing really good on that price. That is way less than we pay for them even. I am glad you mentioned that, I may just get them there from now on.

BTW, the 6 bolts studs at least are on backorder from the company. The last set (this week) had to be trucked up from TX from our usual supplier. It was the only place in the country they had any left.