ARP Custom Age 625+ Head Stud Kit | Subaru WRX/STi EJ20 & EJ25 (260-4704)
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Subaru WRX & STi (EJ20 and EJ25) Head Studs
CUSTOM AGE 625 PLUS®: 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.
Features
- 625 Super-Alloy
- Tensile strength: 260,000+ PSI
Applications
- Subaru WRX & STi (EJ20 and EJ25)
What's in the box?
- ARP head studs
- Parallel ground washers
- 8740 chromoly steel 12pt nuts
- (1) .5 oz. pack of ARP Ultra-Torque fastener assembly lubricant
Warranty
- ARP Warranty
best stuff out there
Great replacement studs for those with future (mods) plans and staying under maybe 5-600hp or high boost... beside these, ill go 1/2 or 14mm. These fits great those who wants peace of mind on mild (EJ) mods...
Awesome studs. Paid for two day shipping and took map a week to ship. Could have bought them off of eBay cheaper and had them sooner