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If you are running in excess of 45psi of boost on your 24V or Common Rail Dodge Cummins you run a real risk of stretching your stock head bolts causing head gasket failure. ARP diesel head studs are good insurance against head gasket failure. Don't ruin your day at the track or dyno. Get it done! It is for good reason that virtually every top professional engine builder relies on ARP Pro Series head studs for their all-out competition powerplants. Simply stated, there's not a better stud setup on the market today. ARP uses a premium grade 8740 alloy that is rated far superior to aircraft quality. Then, each stud is placed vertically in special racks and precisely heat-treated to 200,000 psi. ARP studs are thread rolled after heat-treat, which gives them about 1000% (that's ten times) better fatigue strength than those studs that are threaded prior to heat-treat (a very common industry practice). You won't find a better quality stud on the market from any other source.