Avenger XTC A356 aluminum heads with stage 3 port work, 265cc intake port, 70cc combustion chamber, RaceFlo 2.25 x 1.675 stainless steel valves, Pacific 1.550 dual valve springs, heads flow 375 @ .700 intake / 270 @ .700 exhaust, stainless retainers, bronze valve guides, 11/32" valve stems, hydraulic roller set up, will bolt up to 302, 351C or 351W, sold as pair, 3 angle valve job, fully assembled, new, 2750.00