Afr - Airflow Research 3001 Fully Assembled 335cc Enforcer Cylinder Head, Big Block Chevy

Fully Assembled 325cc Enforcer Cylinder Head Big Block Chevy 122cc Combustion Chamber 24/4 Intake, 15/4 Exhaust Valve Angles A356 Aluminum Sold Individually Breakdown of Included Items Flow Chart Features: For 509 to 540ci engines operating below 6,500 rpm Intake Port Volume: 325cc Intake Port Dimension: 2.510 in. Height x 1.820 in. x 3/8 in. Radius Intake Port Location: Stock Exhaust Port Volume: 140cc Exhaust Port Dimension: 1.690 in. H x 1.900 in. W Exhaust Port Location: .357 in. Raised Valve Spring Pocket Diameter: 1.750 in. O.D Max Valve Spring Pocket Machining: 1.750 in. O.D Deck Thickness: .450 in. Minimum Bore Diameter: 4.250 in. Reduce Combustion Chamber Size 1 cc by Flat-Milling .006 in. from Deck Surface, Maximum Mill .102 in. to achieve 105 cc. Angle Mill: Reduce Combustion Chamber Size 1 cc by Flat-Milling .009 in. from Deck Surface, Maximum Mill .198 in. to achieve 100 cc. (Angle Milling will require the use of a .120 in.