AFR 165cc SBF Renegade 20° Street 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 aluminum cylinder heads. Unlike some aftermarket heads, AFR´s performance cylinder heads (CARB EO #250-3) fit all your stock components; no special parts are required! With lightweight 8mm 1.900 intake valves, 1.600 exhaust valve, combustion chamber volume of 58cc, and 68cc exhaust ports, AFR´s new 165cc is perfect for 289 and 302 engines operating from idle to 6000 rpm. A 3/4" thick head deck makes it ideal for nitrous or blower applications. These heads will not accept rail rocker arms. Hardened push rods required on all applications. Note: 1986 5.0L must have piston notched for clearance.
Note:
Hydraulic roller cams typically experience valve float at 6000-6200 rpm because of their fast ramp rates. AFR suggests you upgrade your springs to AFR part #8605, 1.290 O.D. with higher spring pressuresto reduce chances of valve float associated with rpm´s 6200 or higher. (see footnotes here)
165cc SBF Street Cylinder Head Flow Chart
Tested on 4.060 Bore
Basic Package Components
100% CNC Ported Combustion Chambers
100% CNC Ported Exhaust Ports
100% CNC Ported Intake Ports
Competition 5-angle Valve Job
AFR #7249
Bead Lock Intake Valve, 1.900" stud mount
AFR #7250
Bead Lock Exhaust Valve, 1.600" stud mount, 58cc
AFR #7262
Bead Lock Intake Valve, 1.900 Pedestal
AFR #7264
Bead Lock Exhaust Valve, 1.600 Pedestal
AFR #8017
1.290" OD Hydraulic Dual Valve Spring, 135 lbs on seat,
Comp Pkg #8019
.600" maximum lift (upgrades available), #8019 1.270 OD
Specifications, Features, and Optional Supporting Components
65-70 ft. lbs with 7/16" stud
Head Torque
55-60 ft. lbs
Rocker Stud Torque
25-30 ft lbs.
Rocker Pedestal Torque
AFR #6828
Intake Port Gasket, 1.200" X 2.000" w/ 3/8" radius, Fel-Pro #1250
Important: Do not port match your intake manifold to Fel-Pro gasket as it does not precisely fit AFR heads.
AFR #6323
SBF 7/16" Head Bolt Kit, ARP #154-3701
AFR #6322
SBF 7/16" Bolt, Head Stud Kit, ARP #254-4401
Performer
Suggested Manifold
Autolite 3924
Spark Plug Starting Range
58cc
Combustion Chambers
Can be cut to 1.750, no deeper
Spring Pocket
Standard
Valve Spacing
Standard, will not accept rail rocker arms
Rocker Arms
Standard
Valve Angle
.008" per cc
Angle Mill (10cc Maximum Optional Mill)
.006" per cc
Flat Mill (4cc Maximum Optional Mill)
Note: Milling head deck will affect flow numbers |
