AFR Small Block Chevy 180cc Eliminator Street Aluminum Cylinder Heads

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 327-350ci engines from 1955-86. Also available for 1987 to 1995 cast iron head engines with center bolt valve covers and 2 center intake bolts at 72° angle, AFR head p/n 033-919. No special parts are required. Dual valve cover bolt pattern is standard. Exhaust port and bolt pattern are raised 3/32'' over GM L98 cylinder heads, this rarely affects header or chassis fitment. .

180cc Eliminator Street Cylinder Head Features:

• 100% CNC Ported Combustion Chambers
• 100% CNC Ported Exhaust Ports
• 100% CNC Ported Intake Ports
• Competition 5-angle Valve Job
• 180cc Intake Ports
• 64cc Exhaust Ports
• Bead Lock Intake Valve, 2.020'' x 4.903'' Overall Valve Length
• Bead Lock Exhaust Valve, 1.600'' x 4.955'' Overall Valve Length
• PAC Racing Valve Spring: 1.290'' OD Hydraulic Roller Dual Valve Spring, 135 lbs on seat, .600'' maximum lift
• 7° Manley 4140 Chrome Moly Retainers
• 7° Bead Lock Valve Keepers
• 3/8'' Rocker Studs
• Adjustable 5/16'' Guide Plates
• Viton Valve Seals
• Hardened Spring Cup
• Intake Valve Seats
• Exhaust Valve Seats
• Bronze Valve Guides
• Standard Exhaust Bolt Pattern, Accepts Factory and Aftermarket Headers