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Obtaining the optimum cylinder head-to-block sealing is especially critical in engines employing high compression pistons or power adders like turbochargers, nitrous oxide and superchargers. That's why ARP head studs are popular among racers.

ARP uses a premium grade 8740 alloy that is rated far superior to "aircraft" quality. Then, each stud is precisely heat-treated to 200,000 psi. Following heattreat, each stud is centerless ground to make it as close to perfectly concentric as possible. This procedure involves about ten very slight cuts and results in an exceptionally straight part. It's important to note that lesser quality studs are not even centerless ground—the material is thread rolled in bar stock form (mostly before heat-treat, when the material is easier to machine). Because ARP studs are manufactured to such exacting tolerances, you will note that gaskets and cylinder heads literally glide into position and are perfectly aligned—something that won't happen with inferior quality head studs.

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
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ARP 2000 Head Studs
ARP Pro Series ARP2000 Studs are centerless ground, heat treated prior to thread rolling and machining, and nominally rated at 220,000 psi. These fasteners are reusable with a 25% increase in clamping force compared to the competition

BA BF-FG: $750 fitted

Custom ARP AGE625+
All Custom Age 625+® studs are centerless ground, heat treated prior to thread rolling and ma- chining, and are nominally rated at 270,000 psi. These fasteners deliver a 55% increase in tensile strength and are reusable as compared to the OEM Torque to Yield (TTY) head bolts

BA BF-FG: $1750 fitted

 


For more info, call us on (03)8781 0500 or send an email to:
info@xr6turbodevelopments.com.au


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