Product Description

AFR 180cc SBC “Eliminator” Street Cylinder Head

The Small Port, High Velocity Torque Monster

The Emissions Legal (versions from 1969-94 with heat riser, CARB EO #D-250-2), 180cc intake port small block Chevy “Eliminator” cylinder heads are available in your choice of straight or L98 angle 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. Also available for 1987 to present engines with center bolt valve covers and 2 center intake bolts at 72° angle, AFR Part #0919. No special parts are required. Center bolt valve cover is available as a machine option. Exhaust port and bolt pattern are raised 3/32″ over GM L98 cylinder heads, this rarely affects header or chassis fitment.

Note:

Hydraulic roller cams typically experience valve float at 6200-6400 rpm because of their fast ramp rates. AFR suggests you upgrade your springs to AFR part #8605, 1.270 O.D. with higher spring pressures and use our Patented “Hydra Rev Kit” to reduce chances of valve float associated with rpm 6200 or higher.

180cc Small Block Chevy Street Aluminum Cylinder Head Flow Chart

Tested on 4.060 Bore

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