The Pro Series cylinder head studs ARP has created are heat-treated, thread-rolled and rated at an amazing 200,000 psi tensile strength. Their exclusive 12-point nuts and hardened parallel washers give you improved load distribution, better torque readings and increased material strength.
ARP Fastners - 250-4205 - Features
Custom Age 625 Plus Super Alloy
Improved Clamping Force Prevents Cylinder Heads From Lifting
235K-255K psi Yield Strength
Broached Stud Ends Install & Make Cylinder Head Removal Easier
260K-280K psi Tensile Strength
Heat-Treated Prior To Thread Rolling And Machining For Optimum Fatigue Strength
Includes Chrome Moly Steel 12-Point Nuts
Shot-Peened To Remove Any Surface Irregularities And Upgrade The Overall External Integrity
Black Oxide Coating For Improved Corrosion Resistance
Hardened Parallel Ground Washers For An Even Load Distribution And More Accurate Torque Readings
Centerless Ground To Ensure They Are Perfectly Concentric
Comes With 0.5oz Of ARP Fastener Assembly Lubricant
