AFR 180 Street Ported Cylinder Heads - 75cc

AFR 180 SB Chevy "Eliminator" Street Head - (75cc) The Small Port, High Velocity Torque Monster These AFR 180cc intake port small block Chevy eliminator cylinder heads are the straight plug version. They feature a 75cc combustion chamber, 64cc exhaust ports and a 3/4” thick head deck. Ideal for nitrous or blower applications. Standard valves are lightweight stainless steel 2.020" intake and 1.600" exhaust diameter and feature 8mm stems coupled 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. Factory 23° valve angle and standard valve spacing make this the perfect street aluminum cylinder head for 327 to 355 cubic inch GEN 1 engines from 1955-1986. Dual valve cover bolt pattern is standard. Exhaust port is raised .10" over GM L98 cylinder heads. No special parts are required. Emissions Legal (CARB EO #D-250-2) NOTE: Modern hydraul