AFR BBC Aluminum Heads Rectangular Port 357cc Assembled

AFR BBC aluminum heads rectangular port flowing 357cc with 2.300 Intake/ 1.880 exhaust valves with a 24 degree valve angle. Recommended for race applications or radical “Pro Street” builds with displacements up to 605 cubic inches. Big Block Chevy Cylinder Head Magnum Comp  Assembled  2.300 / 1.880 in Valves 357 cc Intake 121 cc Chamber  1.625 in Springs Aluminum  Pair    .200 .300 .400 .500 .600 .700 .800 Int 167 242 307 354 389 409 419 Exh 135 199 249 276 288 295 305 Test conducted at 28" of water (pressure) on Superflow 600Bore Size: 4.600", intake 3/4" radius plate exhaust, 2 1/8" curved pipe