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AFR's 165cc "Street" cylinder heads are the preferred choice over re-worked factory heads. They feature 100% CNC ported intake, exhaust & chambers, A356 aluminum castings and high quality components throughout, in addition these are the only AFR heads that are compatible with the OEM piston valve relief. Recommended for street, towing, or street/strip engines with displacements up to 351 cubic inches, operating up to 6000 RPM. Legal for 1995 and older emissions controlled vehicles under CARB EO #D-250-3.

165cc Aluminum SBF Cylinder Heads
Part # Rocker Type Combustion Chamber
1399 Stud Mount - Non-Emissions Legal 58cc
1402 Stud Mount - Emissions Legal 58cc
1472 Pedestal Mount - Emissions Legal 60cc

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165cc Street Head Flow Chart
  .200 .300 .400 .500 .550 .600
Int 135 200 240 251 255 260
Exh 122 163 192 208 212 215
Basic Package Components
100% CNC Ported Combustion Chambers
100% CNC Ported Exhaust Ports
100% CNC Ported Intake Ports
Competition 5-angle Valve Job
8mm Bead Lock Intake Valve, 1.900" x 4.900" O.A.L
8mm Bead Lock Exhaust Valve, 1.600" x 4.950" O.A.L
Pedestal 8mm Bead Lock Intake Valve, 1.900" x 5.080" O.A.L
Pedestal 8mm Bead Lock Exhaust Valve, 1.600" x 5.100" O.A.L
PAC Racing Spring 1.290" OD Hydraulic Roller Dual Valve Spring, 140 lbs on seat, .600" maximum lift, Max RPM 6300-6500 (upgrades available)
7° Manley Steel Retainers 1.245" O.D x .885" I.D x .655" I.D
7° Bead Lock Valve Keepers
ARP 3/8" Rocker Studs
Adjustable 5/16" Guide Plates
Viton Valve Seals .600" O.D x .495" I.D
Hardened Valve Spring O.D Locator 1.380" O.D x .570" I.D
Ductile Iron Intake Valve Seats 2.131" O.D x 1.680" I.D x .375" Deep
Ductile Iron Exhaust Valve Seats 1.650" O.D x 1.350" I.D x .375" Deep
8 mm Bronze Valve Guides .502" O.D x 2.100" O.A.L
Thermactor Air Injector Reducer Bushing (5/8"-11 x 7/16"-14)
Specifications & Features:
Material
A356 Aluminum
Intake Port Volume
165cc
Intake Port Dimension
2.060" H x 1.250" W x 3/8 Radius
Intake Port Location
Stock
Exhaust Port Volume
68cc
Exhaust Port Dimension
1.355" H x 1.360" W
Exhaust Port Location
Stock
Combustion Chamber Size
58cc or 60cc
Valve Cover Bolt Pattern
Perimeter Bolt
Valve Angle
20°
Valve Spring Pocket Diameter
1.460" O.D
Max Valve Spring Pocket Machining
1.625" O.D
Deck Thickness
.750"
Minimum Bore Diameter
4.000"
Flat Mill
.006" per cc 54cc Maximum
Angle Mill
.009" per cc 48cc Maximum
Note:Angle mills might require a .120" Thick intake gasket.
Minimum Cross Sectional Area
1.935 sq. in.
Spark Plug Dimensions
14mm x .750" w/Gasket Seat
Carb EO#
D-250-3
Head Bolt Diameter 1402 & 1472
7/16"
Head Bolt Diameter 1399
1/2"