SBC Main Studs Kit, 2-Bolt Mains, Chevy Small Block 350 - 400 + Holden 308 with Girdle.

ARP Main Stud Kits - Small Block Chevy 350 - 2 Bolt Studs.

ARP main stud kits help eliminate main cap walk/fretting and protect the threads in your engine block. They include studs made from 8740 chromoly steel and heat-treated in-house to 190,000 psi tensile-strength rating. 

Main Bolt Style:     2-bolt

Fastener Style:    Stud

Fastener Nut Style:    Standard hex

Works with Windage Tray:    No

Fastener Tensile Strength (psi):    190,000 psi

Nuts Included:     Yes

Washers Included:     Yes

Quantity:      Sold as a kit.

Notes:     Designed to fit large journal crankshafts.