ARP High Performance Main Bolts 4-Bolt Main Large Journal


High Performance Main Bolts

  • Small Block Chevy
  • 4-Bolt Main
  • Large Journal
SKU: ARP134-5202 Category:

Forged from 8740 chrome moly steel, all main bolts feature a reduced wrenching head, large underhead radius and rolled threads for the utmost in reliability. The threads are rolled after heat-treating which gives them about 2000% better fatigue strength than most main bolts that are threaded prior to heat-treating. Hardened parallel-ground washers are included with each kit.

High Peformance Series: Rated at 180,000 psi and are a premium replacement for OEM fasteners.

Pro Series: Application-specific, rated at 190,000 psi and designed for use in competition engines.




ARP High Performance Main Bolts

4-Bolt Main Large Journal

Small Blcok Chevy. ARP’s Main Bolts are far superior to any other main bolts available, for use in both street or competition, designed to meet the exacting standards and demands of professional engine builders.

Prop65WARNING: These auto parts can expose you to chemicals including phthalates and lead. Installing or using these parts can expose you to other parts containing these chemicals and to engine exhaust, which are known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to