Quote:

What's the difference between bolt ARP 140-5001 and stud ARP 140-5401? Studs center caps not bolts?


About $30
The studs are stronger, 200,000 psi vs 180,000 psi for the bolts and will have a higher clamping force.
The bolts are pretty nice. I have them on my small block to clear the oil pump (studs don't clear the oil pump on a small block), but I use the studs on my big blocks.