The Baddest 23°Standard Port Head

227cc Racing Head, Angle Plug, Standard Exhaust 1067

227cc Racing Head, Angle Plug, Spread Port Exhaust 1075

227cc Racing Head, Angle Plug, Standard Exhaust 1068

High flowing AFR 227cc intake port small block Chevy angle plug cylinder heads are available in three stages of performance. The Race Ready version features 100% CNC ported intakes while the higher flowing Competition version features 100% CNC ported intakes with greater detail. Both come with 100% CNC ported 76cc combustion chambers and 80cc exhaust ports with a 3/4” thick head deck (ideal for nitrous or blower applications). In addition we also offer the “as cast” Stage 1 heads for 227cc performance on a budget. Standard valves are 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 23º 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. The 227cc heads are available in either standard or spread port exhaust. AFR offset stud girdles are the only special parts required. Some applications require shaft mount rockers for durability and reliability of valve train components. Not recommended for street use, unless shaft mount rocker is used.

Basic Package Components

100% CNC Ported Combustion Chambers

100% CNC Ported Exhaust Ports

70% to 100% CNC Ported Intake Ports

Competition 3-angle Valve Job

Intake Valve, 2.100" x .050" long, AFR #7031

Exhaust Valve, 1.600" x .050" long, AFR #7057

1.550" OD Roller Valve Spring, 220 lbs. on seat, .670" maximum lift, AFR #8000

10º 4140 Chrome Moly Retainers, AFR #8510

10º Valve Locks, AFR #9005

7/16" Rocker Studs, AFR #6405

5/16" Guide Plates, AFR #6105

Valve Seals, AFR #6611

Hardened Shims, AFR #8045

Intake Valve Seats, AFR #9060

Exhaust Valve Seats, AFR #9070

Bronze Valve Guides, AFR #9050

Special orders available on request.

All Accessory Holes are Predrilled & Tapped!

Specifications, Features, and Supporting Components

Head Torque 65-70 Ft. Lbs.

Rocker Stud Torque 55-60 Ft. Lbs.

Intake Port Gasket, 1.310”x2.180” w/ 3/8" radius, AFR #6820

Important: Do not port match your intake manifold to this Fel-Pro gasket, as they do not exactly fit AFR heads.

Exhaust Port Gasket Fel Pro #1406, AFR #6835

Head Gasket 350cid Fel Pro #1003, AFR #6800

400cid Fel Pro #1014, AFR #6802

Head Bolts & Studs Standard ARP, AFR #6310 & #6305

Head Bolt Washers Manley, AFR #6320

Stud Girdle AFR #6206

Suggested Manifold Victor Jr, Super Victor, or HV1000; AFR #5005, #5003, or #5065

Spark Plug Starting Range Autolite 3910

Combustion Chambers 76cc

Spring Pocket can be cut to 1.575, no deeper.

Valve Spacing 60/40

Rocker Arms Standard

Valve Angle 23º

Angle Mill (milling available) .008” per cc

Flat Mill (milling available) .006” per cc

Pushrods 5/16” Hardened, AFR #6601 thru #6604 vNote: Milling head deck will affect flow numbers.