6.0L 6.2L CNC Bare Single Rectangle Port Aluminum Cylinder Heads. Cylinder Head Material:Aluminum. Cylinder Head Finish: Natural. Combustion Chamber Volume (cc): 70 cc. CNC-Machined Combustion Chamber: No. Intake Runner Volume (cc): 260 cc. Exhaust Runner Volume (cc): n/a. CNC-Machined Intake Runner: No. CNC-Machined Exhaust Runner: No. Intake Port Shape: Rectangular. Intake Port Location: Standard. Exhaust Port Shape: Oval. Exhaust Port Location: Standard. 1 X Cylinder Head.