AFR 260cc LS3 Mongoose 69CC, CNC Ported Cylinder Heads (Sold as a pair)

260cc Intake Port Volume 95cc Exhaust Port Volume 69cc Combustion Chamber Size 12° Valve Angle .750″ Deck Thickness 4.000″ Minimum Bore Dia. 100% CNC Ported Combustion Chambers 100% CNC Ported Exhaust Ports 100% CNC Ported Intake Ports Competition 5-angle Valve Job 8mm Bead Lock Intake Valve, 2.165″ x 5.200″ Overall Valve Length 8mm Bead Lock Exhaust Valve, 1.600″ x 5.205″ Overall Valve Length PAC Racing Spring 1.270″ OD Hydraulic Roller Dual Valve Spring, 155 lbs. on seat, .650 maximum lift, Max RPM 7000-7200 7° Titanium Retainers 1.245″ O.D x .885″ I.D x .655″ I.D 7° Bead Lock Valve Keepers Viton Valve Seals .600″ O.D x .495″ I.D Hardened Valve Spring O.D Locator 1.380″ O.D x .570″ I.D Ductile Iron Intake Valve Seats 2.200″ O.D x 1.750″ I.D x .375″ Deep Ductile Iron Exhaust Valve Seats 1.650″ O.D x 1.350″ I.D x .375″ Deep 8 mm Bronze Valve Guides .502″ O.D x 2.550″ O.A.L Rocker Rail Stand