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AFR Small Block Chevy Heads

AFR 1068 > Heads Small Block Chevy 227cc CNC Ported 65cc Complete, Pair


Cylinder Heads, Race Porting, Aluminum, Assembled, 65cc Chamber, 227cc Intake, Chevy, Small Block, Pair

Available on backorder

Product Info


Natural Aluminum

Combustion Chamber

CNC-Machined 65cc

Intake/Exhaust Runner Volume

CNC 227cc Intake, CNC 80cc Exhaust

Intake Port Shape, Location

Rectangular, Standard

Exhaust Port Shape, Location

Square, Raised

Spark Plug Style


Intake/Exhaust Valve Diameter

2.100" Intake, 1.600" Exhaust

Max Valve Lift


Outside Diameter of Outer Spring


Springs Per Valve


Retainer Material

Chromoly Steel

Valve Lock Style


Guideplate Pushrod Size


Valve Cover Bolt Style

Perimeter Bolt

Intake/Exhaust Valve Angle

23° Intake, 23° Exhaust

Valve Guide Material


Valve Seat Material

Ductile Iron

Oiling Style

Through Pushrod


Not compatible with self-aligning rocker arms.

Product Description

AFR 227 Small Block Chevy Cylinder Head. High flowing 227cc intake port small block Chevy angle plug aluminum cylinder heads. The Race Ready version features 100% CNC ported intakes 65cc combustion chambers and 80cc exhaust ports with a 3/4″ thick head deck (ideal for nitrous or blower applications) Standard valves are lightweight 8mm 2.100 intake and 1.600 exhaust with AFR’s hardened ductile iron interlocking valve seats. The 227 has 60/40 valve spacing and piston valve pockets should be checked. The exceptional flow characteristics and 23 valve angle make this the perfect head for 350 to 434 cid engines in drag cars, sprint cars, and late model oval trackers operating from 4500 rpm and up. AFR offset stud girdles are the only special parts required. Some applications require shaft mount rockers or .050 offset rocker arms for durability and reliability of valve train components. Dual valve cover bolt pattern is standard. The Exhaust port is raised .250 over GM L-98 cylinder head.