Aluminum heads. New big block Chevy rectangular port Flo-tek aluminum heads, all new parts, Manley valves, k-motion k-950 springs, super 7 titanium retainers & locks, 3/8 guide plates, 7/16 rocker arm studs, bought for customer that backed out of deal, his loss your gain, selling for the balance he owes me. Also have a set of JE pistons & rings 4.350 bore, 1.645 compression height, small dome, $600.00