Cylinder Head and Block Expansion plug kit for Dodge Cummins 4bt, 6bt, 12v, 5.9L 1989-1998. Kit comes with :- All expansion plugs for Cylinder head and Engine Block except Pipe plugs Rear Cam plug and O ring Cylinder head alignment Dowels. All the expansion plugs are galvanized. Please contact us if you have any question regarding fitment with ESN number. Note: All manufacturer's names, part numbers, and symbols are registered trademarks of these manufactures and supplied for reference purposes only. PB Sales, Inc. is in no way implying that any part listed is the product of these manufacturer's or that we are affiliated with any of these manufacturer's .