AFR - Airflow Research 2101: 325cc Rectangle Port 24° Magnum Aluminum Cylinder Heads BB-Chevy
50% CNC Combustion Chamber (Bowl Blend) Package
325cc Rectangle Port 24° Magnum Aluminum Cylinder Heads BB-Chevy 117cc Combustion Chambers 1.625'' Valve Spring 275 lbs. Seat Pressure .850'' Max Lift 50% CNC Combustion Chambers Assembled Sold in Pairs, 2/pkg.