ARP 625 Headstuds for 12V

what are the benifits of these over the 380 dollar 12v arp studs? Ive got the regular 380 dollar arps in my 12v, but im only pushing 42 psi of boost. Im thinking of moving to teins wich im sure will push up to round 55 or 60 psi. DOnt know if these would hold it better than the regular ones or not? are you able to torque them down more or somthing?
 
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