Avenger A356 aluminum heads fully assembled CNC, 280cc intake port, 74cc combustion chamber, ProFlo 2.20 x 1.81 stainless steel valves, Pacific 1.550 dual valve springs, heads flow 355 @ .700 intake / 258 @ .700 exhaust, chromoly retainers, 3/8" valve stems, bronze valve guides, new, 2300.00