244-4300 ARP Head studs 
 
When tested clamping force was,
35FT/LBS = 4,900 PSI
75FT/LBS = 8, 775 PSI
105 FT/LBS = 12,500 PSI
 
Another interesting note is the torque lost on a new stud, vs a seasoned stud.
When trying to make big boost we always recommend a retorque of the head studs after the first heat cycle. You will be very surprised how loose the center bolts can get after the initial heat cycle.
New Stud Loses 15-25 FT/LBS After a Heat Cycle, a seasoned Stud lost 8-12 FT/LBS of Torque after a Heat Cycle.