ARP

Head Stud Kit Custom Age 625+ (WRX MY98-14/STI MY98-18)

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  • Regular price $1,099.00


This newly formulated super-alloy demonstrates superior fatigue cycle life, tensile strength and toughness – with complete resistance to atmospheric corrosion and oxidation. ARP is the first to develop manufacturing and testing processes for fasteners with Custom Age 625+. Best of all it is less expensive and expected to soon replace MP-35 as the material of choice in the high strength, super-alloy field. Typical tensile strength is 260,000-280,000 psi.

All Custom Age 625+ studs are centerless ground, heat treated prior to thread rolling and machining, and ar 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.


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