ARP Header Bolt - 8 mm x 1.25 Thread - 0.984 in Long - Hex Head - Washers Included - Chromoly - Black Oxide - GM LS-Series - Set of 12 Westhold Aluminum fittings have a o-ring

Aluminum fittings have a o-ring seal and a built-in hex with a 1-5/8" -12 thread

1997-2009 Chevrolet C6500 Kodiak

Chevrolet: K3500 88 - 97 7

than 1 piece designs

ARP Header Bolt - 8 mm x 1.25 Thread - 0.984 in Long - Hex Head - Washers Included - Chromoly - Black Oxide - GM LS-Series - Set of 12 Westhold Aluminum fittings have a o-ringARPs 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: Header Bolt 8 mm x 1. 25