Avenger A356 aluminum heads fully CNC, 230cc intake port, 67cc combustion chamber, ProFlo 2.08 x 1.60 stainless steel valves, Pacific 1.460 dual valve springs, heads flow 325 @ .700 intake and 248 @ .700 exhaust, bronze valve guides, race radius valve job, fully assembled, sold as pair, new, 1750.00