ARP Main Stud Kit with 12-Point Nuts 155-5421 STREET PERFORMANCE BALANCERS are the

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144-4204 Head Studs w/12-Point Nuts Specifications

ARP Main Stud Kit with 12-Point Nuts 155-5421 STREET PERFORMANCE BALANCERS are the155 5421 Main Stud Kit with 12 Point Nuts Specifications Fastener Nut Style Standard 12 point Fastener Style Stud Fastener Yield Strength (psi) 200,000 Main Bolt Style 2 bolt Nuts Included Yes Washers Included Yes Works with Windage Tray No Applies to: Ford 390 428 FE, 2 Bolt Main