ARP Subaru WRX/STI EJ20/EJ25 Head Stud Kit (260-4701)

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 

Features

• Premium 8740 chromemoly steel
• 190,000 psi tensile strength
• Heat treated and thread rolled
• More consistent clamping force
• Helps prevent blown head gaskets
• Includes 12-point nuts and parallel ground washers