ARP Head Stud Kit Ford 6.0L Diesel Round Steel Tubing Tubing Bushing includes a 40 durometer

Bushing includes a 40 durometer insert

Junior Dragster

600 in Knurl

LT1 OptiSpark II

Side B is AN-10

ARP Head Stud Kit Ford 6.0L Diesel Round Steel Tubing Tubing Bushing includes a 40 durometerARPs 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 12 Point