Head Studs vs Bolts (ARP)
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Joined: May 2025
Posts: 50
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From: Dayton Ohio
Head Studs vs Bolts (ARP)
At what point would you go with the studs vs the bolts? The cost difference is pretty considerable and I am not doing FI on this build so wondering if the ARP head bolts will be fine. Full NA motor with just about everything done to, but using factory pistons and having the compression ratio around 11.5:1
Melting Slicks
Joined: Oct 2022
Posts: 3,340
Likes: 1,934
From: Ulta Vista, AZ
I think it’s more about the seating state thru and reusabilitly.
At the end of the day, on a build the difference between bolts and studs isn’t game changing.
its been a while since I bought, but like a $100 delta I vaguely remember?
At the end of the day, on a build the difference between bolts and studs isn’t game changing.
its been a while since I bought, but like a $100 delta I vaguely remember?
Safety Car
Joined: May 2016
Posts: 4,669
Likes: 1,849
From: Erlanger, Kentucky
From a power perspective, you would likely need to be pushing 1000+ hp to "need" the head studs.
The advantage of the studs is that all of the threads in the block are being used so clamping force is more evenly distributed. Also, you get more consistent torque values because you are torquing the nut on the ARP stud rather than the ARP bolt on the threads of the block. From experience of using both the ARP bolts and ARP studs, there is much less pucker factor when torquing the studs.
For me going forward, if I can, I will always use the studs.
The advantage of the studs is that all of the threads in the block are being used so clamping force is more evenly distributed. Also, you get more consistent torque values because you are torquing the nut on the ARP stud rather than the ARP bolt on the threads of the block. From experience of using both the ARP bolts and ARP studs, there is much less pucker factor when torquing the studs.
For me going forward, if I can, I will always use the studs.
Instructor
Joined: Jun 2022
Posts: 219
Likes: 48
From: The Midwest
I bought arp bolts. Before purchasing, i called and talked to tech support. They stated that the head bolts are good to go up to 1000hp. I never did ask if that was crank or wheel but I’ll assume wheel hp because no one measures crank unless your a manufacturer or if you are Richard Holdener.
