ARP main bolts

MOPARJ said

The reason for the higher torque figure is to gain clamp load over the OEM fastener. This is one of the main benefits to ARP fasteners; the added clamp load can be beneficial in higher output applications, to help prevent cap walk.

The higher torque is possible through a higher tensile strength material than what is used on the factory fasteners. Additionally, the torque spec listed is not at the yield point of the fastener, so they should be reuseable so as long as the installation procedure is followed and no obvious deformation to the fastener is noticed.

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yes I torqued them twice in the prescribed manner during mockup and measurement. They looked like new still so I torqued them one more time for final assembly and called it good.

I was just curious as to why they called for 15 more ft lbs, and what you have said makes perfect sense to me. I looked around but there is very little info I could find on the bolts since everyone uses studs. I wasnt sure I was looking at the right info on the ARP website either.

Then I found the spec sheet today in the garage and felt a lot better about it. I had final torqued these a couple weeks ago IIRC so it wasnt fresh in my mind and after reading up online in a panic and finding nothing last night I was beginning to second-guess myself. I do that a lot.

The thought of them not being near their yield and the fact that the extra clamping doesnt seem to be distorting anything makes me feel convinced I'm fine.

Thanks for the information. I appreciate it!

For anyone else planning on using these, on the rear cap I had to take a tad off the pump and have the cap slightly spot faced for them to fit without hitting. If you were to grind the head down you'd have nothing left to grab.