AFR Mongoose 230CC LS1 CYLINDER HEADS

Our 230cc LS1 MONGOOSE cylinder heads are recommended for aggressive street or street/strip builds with displacements up to 427 cubic inches operating at or below 7200 RPM. Capable of flowing 328 CFM at 0.650" lift with a 4.000" bore size. Included Components 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, 2.080" x 4.900" Overall Valve Length AFR #7208 8mm Bead Lock Exhaust Valve, 1.600" x 4.900" Overall Valve Length AFR #7228 PAC Racing Spring 1.270" OD Hydraulic Roller Dual Valve Spring, 155 lbs. on seat, .650” maximum lift, Max RPM 7000-7200 AFR #8019 7° Titanium Retainers 1.245" O.D x .885" I.D x .655" I.D AFR #8512 7° Bead Lock Valve Keepers AFR #9007* Viton Valve Seals .600" O.D x .495" I.D AFR #6612 Hardened Valve Spring O.D Locator 1.380" O.D x .570" I.D AFR #8042 Ductile Iron Intake Valve Seats 2.131" O.D x 1.680" I.D x .375" Deep