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Message: [QUOTE="Morgan@Midwest Diesel & Auto, post: 881672, member: 8143"] I think that the biggest thing is that arp's are being used at a much higher volume than the a-1 are. So by theory if 10 arp's are installed for every 1 set of a-1's you would see more cracked blocks by default. And there were a lot of people over torquing arp's an not following directions. The torque doesn't matter. The stud still produces xx amount of pull on the block to put xx amount of force on the head. The only thing you gain by going to a higher tensile strength is having less chance of further stretching the stud under super high stress aka; lifting a head. But since we use 16mm head stands on the 6.4 factory I have yet to see a properly installed 190,000 psi arp 2000 stretch. Doesn't mean it can't happen. I just have never seen it or ever heard of it from anyone else. [/QUOTE]

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