ARP Head Bolt Kit Small Block Ford 351W

ARP's High Performance Series head bolt kit, purpose-built for the Ford 351 Windsor. Forged from premium 8740 chromoly steel and rated at 180,000 psi tensile strength — about 15 percent stronger than a Grade 8 fastener and the standard upgrade when factory bolts give up under boost, nitrous, or aggressive timing. Each bolt is heat-treated, precision-machined, and shipped with hardened parallel-ground washers to ensure even clamping pressure across the head gasket.

Kit includes:

• Head bolts in correct lengths for the 351W deck
• Hardened parallel-ground washers
• ARP thread lubricant for accurate torque readings

Installation note: torque in three equal steps. Final torque with ARP lube on 1/2" bolts is approximately 100–110 ft-lbs — always confirm against the instruction sheet supplied with your kit.