These 180cc intake port small block Chevy eliminator cylinder heads are straight plug versions. These performance heads feature a 75cc or 65cc combustion chamber with a 64cc exhaust port and a 3/4" thick head deck (ideal for nitrous or blower applications.) Standard valves are lightweight 8mm 2.020 intake and 1.600 exhaust with AFR's hardened ductile iron interlocking valve seats. The exceptional flow characteristics, ideal operating range of idle to 5500 rpm (higher rpm ranges possible depending on combination of parts), 23° valve angle, and standard valve spacing make this the perfect street aluminum cylinder head for 327 cid to 350 cid engines from 1955-86.

• 100% CNC Ported Combustion Chambers
• 100% CNC Ported Exhaust Ports
• 100% CNC Ported Intake Ports
• 3-angle Radiused Valve Job
• Bead Lock Intake Valve, 0" Standard Length
• Bead Lock Exhaust Valve, 1.600" Standard Length
• 1.290" OD Hydraulic Dual Valve Spring, 135 lbs on seat,
• .600" maximum lift (upgrades available)
• 7° Chrome Moly Retainers
• 7° Bead Lock Valve Keepers
• 3/8" Rocker Studs
• Guide Plates
• Hardened Spring Cup
• Intake Valve Seats
• Exhaust Valve Seats
• Bronze Valve Guides