ARP Custom Age 625+ 11mm Head Stud Kit For 2002-14 Subaru WRX, 04-18 STI, 05-12 LGT, 04-13 FXT, (EJ20, EJ255, EJ257)

ARP Custom Age 625+ Head Stud Kit Subaru WRX, STI, Legacy GT, Forester XT, EJ20, EJ255, EJ257

Our Price: $612.52

Part#: 260-4704

Description Applications
Custom Age 625 Plus is a newly formulated super-alloy that 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.

ARP's Custom Age 625+ studs are centerless ground, heat treated prior to thread rolling and machining. The studs are nominally rated to 270,000 psi and the fasteners deliver 55% increase in tensile strength.

ARP Head Stud Set includes:
  • (x12) Custom Age 625+ head studs
  • (x12) Parallel ground washers
  • (x12) 8740 chrome moly steel 12 point nuts
  • (1/2 oz.) ARP Ultra-Torque fastener assembly lubricant.

WARNING: This product can expose you to chemicals which is known to the State of California to cause cancer and reproductive harm. For more information, visit

Average Rating: Average Rating: 5 of 5 5 of 5 Total Reviews: 1 Write a review »

  0 of 0 people found the following review helpful:
5 of 5 This company is the sh*t November 30, 2016
Reviewer: Tyler Sites from Boiling Springs, PA United States  
I bought 2.5 closed deck as well from this company all I can say is I'm shocked at how nice their products are and I highly recommend anything they make

Was this review helpful to you?