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60mm Valve Head Size Standard Valve Head Diameter 40mm Valve Type Intake Valve Stem Diameter 6
ARP 5/16"-18 x 3
Manufacturer's Part Number: SPRK-TS1012-C20
Stealth Ride Part Number: ARP-774-1011
Manufacturer's Part Number: 137924155
ARP Ford, Big Block 460 cid with Trick Flow “Pro Stock” – Trick Flow Prostock 12pt head stud kit (255-4305) Sylphy 3rd Gen 60mm Valve Head Size StandardARP Trick Flow Prostock 12pt head stud kit (255 4305) ARP Pro Series Cylinder Head Studs 255 4305 ARP Pro Series cylinder head studs are cold forged to ensure molecular integrity. They're heat treated prior to thread rolling and machining. ARP Pro Series kits are also available with 12 point nuts, and all studs come complete with hardened parallel washers for an even load distribution and accurate torque readings. With hundreds of models ready to
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