AFR BBC Aluminum Heads Rectangular Port 315cc Assembled

AFR BBC aluminum heads rectangular port flowing 315cc with 2.250 Intake/ 1.880 exhaust valves with a 24 degree valve angle. Recommended for aggressive street, or street/strip builds with displacements up to 540 cubic inches, operating up to 6800 RPM. Big Block Chevy Cylinder Head Magnum Comp Assembled 2.250 / 1.880 in Valves  315 cc Intake 121 cc Chamber 1.625 in Springs  Aluminum Pair 315cc Competition Flow Chart   .200 .300 .400 .500 .600 .700 .800 Int 163 239 301 349 380 386 387 Exh 138 184 238 271 285 293 299 Test conducted at 28" of water (pressure) on Superflow 600Bore Size: 4.600", 3/4" radius plate exhaust, 2 1/8" curved pipe