Crankshaft Main Studs Vs Main Bolts

[TheM3nsah]

Is there a benefit to using ARP main studs to fasten in the crank caps vs the stock bolts? i would like to see if the extra cost is justified on a non moving, non sealing part. i can understand why head studs are good but main studs...whats the big deal there?

[bmwplanet]

One Advantage of them would the be the extremely high quality material of the ARP hardware, and their rolled threads. I think that largely it is just a security measure in making sure the crank stays put under stressful situations. Also, they are re-usable which is obviously nice. Obviously the Head bolts are stretch bolts, but I believe that the mains are stretch bolts as well. You torque them down to a point where they are in the elastic range, meaning that they will be in compression as they are constantly pulling the caps tight to the block. They are a one shot deal, the stock ones.

That's all I got, I think I've covered most of it. Im sure ARP has a schpeel on their site if you want more.