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These ARP main studs are made from 8740 chromoly steel and have a 190,000 psi tensile-strength rating. They are precision centerless-ground and thread-rolled to Mil-S-8879 specs, with a black oxide finish for corrosion resistance. The kits come complete with hardened washers and high-strength hex nuts.
Ford Modular V8 "late aluminum block" M9
Manufacturer's Part Number:156-5002
Part Type:Main Cap Fasteners
Product Line:ARP Main Stud Kits
Main Bolt Style: 4-bolt
Fastener Style: Stud
Fastener Nut Style: Standard 12-point
Works with Windage Tray: No
Fastener Yield Strength (psi): 200,000 psi
Nuts Included: Yes
Washers Included: Yes
Quantity: Sold as a kit.
Notes: Designed to fit late aluminum M9 production engine blocks. Side bolts only.