ARP Custom Age 625+ Head Stud Kit (WRX 01-14/STi 02-20)
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.
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.
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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Head Alteration Required - No
Length - OEM Spec
Location - Head
Machining Required - No
Material - 8740 Chrome Moly Steel
Qty - 12
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(12) Set of Custom Age 625+ Head Studs
(12) Parallel Ground Washers
(12) Chrome Moly Steel 12 Point Nuts
(1) 1/2oz pack of ARP Ultra-Torque fastener assembly lubricant
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2001-2014 Subaru WRX
2002-2020 Subaru STi
2003-2012 Subaru Forester XT
2004-2012 Subaru Liberty GT
2004-2009 Subaru Outback XT
