ARP 234-4314 Pro Series High Performance CA625+ Cylinder Head Stud Kit
GEN III/IV LS 2004-2014
When you need the best head studs on the market for the high boost or nitrous LS combinations then these 625+ head studs are what you want. Typical tensile strength is 260,000-280,000 psi.
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+. These are the Head Studs to choose in the high strength, super-alloy field.
ARP Pro Series cylinder head studs are cold-forged to ensure molecular integrity. They're heat-treated prior to thread rolling and machining. ARP Pro Series kits are also available with 12-point nuts, and all kits come complete with hardened parallel washers for an even load distribution and accurate torque readings. With hundreds of models ready to ship, these cylinder head fasteners can be ordered for virtually any style engine.
*Be sure to note which head bolts you need as GM used two different style LS head bolts. 1997-2003 heads used Quantity 8 155mm Bolts, Quantity 2 100mm bolts, and Quantity 5 45mm bolts. The 2004-2014 heads used Quantity 10 100mm bolts, and Quantity 5 45mm bolts.