If you have plans to make serious power, ie - over 550+whp, consider the best and strongest head studs available! That's where these ARP CA625+ Alloy Head studs come into play.

ARP Custom Age 625+ cylinder head studs are cold-forged to ensure molecular integrity. They're heat-treated prior to thread rolling and machining. These ARP CA625+ kits come with 10 oversized 5/8 wrenching 12-point nuts, 10 CA625+ studs, 10 hardened parallel washers for an even load distribution and accurate torque readings, ARP Ultra-Torque Fastener Assembly lubricant, and installation instructions.

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+. Typical tensile strength is 260,000-280,000 psi.

ARP fastener kits are all made in the USA!