ARP Head Stud Kit - Ford 351W/ Factory & Most Aluminum Heads - 12 Pt. Nuts w/ Undercut Studs BR40022 Internal seal diameter of

Internal seal diameter of

Includes locking collar

high performance direct fit and racing air filters

Plastic / Steel

Chassis Support Kit

ARP Head Stud Kit - Ford 351W/ Factory & Most Aluminum Heads - 12 Pt. Nuts w/ Undercut Studs BR40022 Internal seal diameter ofARPs product line contains thousands of part numbers, and has expanded to include virtually every fastener found in an engine and driveline. These range from quality high performance OEM replacement parts to exotic specialty hardware for Formula 1, IndyCar, IMSA, NASCAR and NHRA drag racing and marine applications. Since 1968, ARP is the fastener of champions and the world leader in fastener technology. Product Description: Cylinder Head Stud Kit 12