AFR LS1 Heads 210cc Mongoose Street Assembled

AFR LS1 cylinder heads 210cc mongoose street assembled heads with 66cc chamber and 2.020 intake/ 1.600 exhaust valves. Recommended for street, towing, or street/strip engines with displacements up to 383 cubic inches, operating up to 6300 RPM. Requires minimum 3.900” bore size for intake valve clearance. GM LS1 Cylinder Head LSX Mongoose Street  Assembled  2.020 / 1.600 in Valves 210 cc Intake  66 cc Chamber  1.290 in Springs Aluminum GM LS-Series Pair 205cc Competition Flow Chart   .200 .300 .400 .500 .550 .600 Int 147 214 249 284 296 301 Exh 111 150 209 225 230 233 Test conducted at 28" of water (pressure) on Superflow 600Bore Size: 3.900", intake 3/4" radius plate exhaust, 1 3/4" curved pipe