Street CNC Ported 58cc Combustion Chamber. Suit Small Block Ford

AFR1399

R1399

These heads come ready for the maximum street/strip Small Block Ford performance possible. AFR's 185cc sport lightweight 8mm 2.020 intake and 1.600 exhaust valves with options for either 58cc or 72cc combustion chambers and 70cc exhaust ports. With AFR's 3/4" thick head deck, it's no problem handling that additional cylinder pressure. Each head is also drilled for the larger 1/2" head bolt for maximum head gasket retention as a standard feature of this serious race piece in street disguise. Basic Package Components: 100% CNC Ported Combustion Chambers 100% CNC Ported Exhaust Ports 100% CNC Ported Intake Ports 3-angle Radiused Valve Job Bead Lock Intake Valve, 2.020" stud mount Bead Lock Exhaust Valve, 1.600" stud mount 1.290" OD Hydraulic Dual Valve Spring, 135 lbs on seat, .600" maximum lift (upgrades available) Hydraulic Roller Spring 1.270 O.D. 7° Chrome Moly Retainers 7° Bead Lock Valve Keepers 3/8" Rocker Studs 5/16" Guide Plates Viton Valve Seals Hardened Spring Cup Intake Valve Seats Exhaust Valve Seats Bronze Valve Guides