The ARP High Performance Main Bolt Kits are forged from premium 8740 chrome moly and all the bolts feature and generous under-head radius and heat treating for utmost reliability. The threads are rolled after heat treating, which makes them about 1000% stronger then most other main bolts. These bolts are nominally rated at 180,000 psi, and are a premium replacemnt for any OEM fastener.
# SB Ford with 2-bolt mains 351W
# Enough bolt to do one complete engine
# Hex head design
# 8740 chrome moly material