Avenger cylinder heads as cast fully assembled, 336cc intake port, 121cc combustion chamber, Manley 2.25 x 1.88 stainless steel valves, Comp. Cams 1.460" dual valve springs w/ max. .650" lift for hydraulic roller camshaft, 11/32" valve stems, chromoly retainers, bronze valve guides, flows 356 @ .650 intake / 277 @ .650 exhaust, stock intake & .375" raised exhaust port locations, 3 angle valve job, sold as pair, new