Our water pump housing bolt kit includes the bolts to attach a water pump housing to your engine block. Supplied in a good looking gold irridite finish. The missing bolt on the lower left side is included with our 109-1511 "Alternator bolt kit," since the type of alternator brackets being used will affect the length of this bolt. The missing bolt on the upper right hand side of the housing is used to hold the power steering brackets on (used only with power steering cars, of course) and it is supplied with our 109-1513 "Power steering bolt kit" if needed.