-= CPR - AirFlow Research Small Block Ford Heads - 165cc =-
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AFR 165cc SBF Street Cylinder Head

The Small Port, High Velocity, Emission Legal Torque Monster

For the ultimate small block Ford street car, you’ve got to use AFR’s all new 165cc emissions legal cylinder heads. Unlike some aftermarket heads, AFR’s Ford head (CARB EO #250-3) fits all your stock components; no special parts are required! With 1.900 intake valves, 1.600” exhaust valve, and combustion chamber volumes of 58cc or 61cc, and 69cc exhaust ports, AFR’s new 165cc Ford head is perfect for 289 and 302 engines operating from idle to 6000 rpm. A 3/4” thick head deck makes the AFR head ideal for nitrous or blower applications. Will not accept rail rocker arms. Hardened push rods required with part numbers 1400 and 1402. Note: 1986 5.0L must have piston notched for clearance.


Hydraulic roller cams typically experience valve float at 5800-6000 rpm because of their fast ramp rates. AFR suggests you upgrade your springs to AFR part #8032, 1.530 O.D. with higher spring pressures to reduce chances of valve float associated with rpm’s 6000 or higher.

Hold mouse over image to see flow specs.


165cc SBF Street Head Part Numbers

CNC Ported Pairs of Cylinder Heads Complete With Parts and Ready to Install

 CNC Street Ported Heads



 Part Number

 165cc Street Heads, Stud, 58cc
 165cc Street Heads, Pedestal, 60cc
 165cc Street Heads, Stud, 61cc

 Stage 1- Bare Heads No Porting or Parts



 Part Number

 140cc Street Heads, Stud, 55cc
 140cc Street Heads, Pedestal, 55cc

Stage 1 Bare Heads (no parts or porting) are available.

*Only models with heat riser (marked by an asterisk)
are emissions legal, all others are not legal for sale or use on
pollution controlled motor vehicles in the United States.

Basic Package Components

100% CNC Ported Combustion Chambers
100% CNC Ported Exhaust Ports
100% CNC Ported Intake Ports
Competition 3-angle Valve Job
Intake Valve, 2.020” stud mount, AFR #72060
Exhaust Valve, 1.600” stud mount 58cc, AFR #7219
Exhaust Valve, 1.600” stud mount 61cc, AFR #7220
Intake Valve, 1.900 Pedestal, AFR #7201
Exhaust Valve, 1.600 Pedestal, AFR #7226
1.450” OD Hydraulic Dual Valve Spring with dampner, 120 lbs. on seat, .550” maximum lift (upgrades available), AFR #8020
10º Chrome Moly Retainers, AFR #8510
10º Valve Locks, AFR #9005
3/8” Rocker Studs, AFR #6410
5/16” Guide Plates, AFR #6107
Valve Seals, AFR #6611
Hardened Shims, AFR #6326
Intake Valve Seats, AFR #9058
Exhaust Valve Seats, AFR #9069
Bronze Valve Guides, AFR #9049
Thermactor Air Injector, AFR #6226
Special orders available upon request

All Accessory Holes are Predrilled & Tapped!

Specifications, Features, and Supporting Components

Head Torque 65-70 Ft. Lbs. with 7/16” stud
Rocker Stud Torque 55-60 Ft. Lbs.
Rocker Pedestal Torque 25-30 Ft. Lbs.
Intake Port Gasket, 1.200”x2.000” w/ 3/8" radius, AFR #6828
Exhaust Port Gasket Fel Pro #1415, AFR #6837
Head Gasket 1962-82, Fel Pro #1011-1, AFR #6808
1983-93Fel Pro #1011-2, AFR #6809
Head Bolts & Studs Standard ARP, AFR #6323 & #6322
Head Bolt Washers Manley, AFR #6320
Stud Girdle Standard
Suggested Manifold RPM Performer, Performer
Spark Plug Starting Range Autolite 3924
Combustion Chambers 58cc or 61cc
Spring Pocket can be cut to 1.625, no deeper.
Valve Spacing Standard
Rocker Arms Standard, will not accept rail rocker arms
Valve Angle Standard
Angle Mill (10cc Maximum Mill) .008” per cc
Flat Mill (4cc Maximum Mill) .006” per cc