Avenger XTC A356 aluminum heads as cast fully assembled, 240cc intake port, 70cc combustion chamber, Manley 2.19 x 1.71 stainless steel valves, Pacific 1.550 dual valve springs w/ .650 lift, heads flow 320 @ .650 intake / 220 @ .650 exhaust, 3 angle valve job, chromoly retainers, 11/32" valve stems, bronze valve guides, set up for hydraulic roller, will fit 302, 351c or 351w, sold as pair, new