ARP AMC Rod Bolt Kit - Fits 258 931117 it is not the only

it is not the only source

5/8-18 in Right Hand Thread

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ARP AMC Rod Bolt Kit - Fits 258 931117 it is not the onlyARPs 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: Connecting Rod Bolt Kit