Avenger A356 aluminum heads as cast, 185cc intake port, 60cc combustion chamber, RaceFlo 2.02 x 1.60 stainless steel valves, Pacific 1.460 dual valve springs, 270 @ .700 intake / 205 @ .700 exhaust, bronze valve guides, heads fit 289, 302, 351W, sold as pair, 3 angle valve job, fully assembled, new 1000.00