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AFR 265cc BBC Oval Port Cylinder Heads, CNC Chambers, No Parts

AFR 3600-1
AFR's 265cc Magnum "As Cast" Oval Port heads are the preferred choice over reworked factory heads. They feature partially CNC ported intake, exhaust & chambers, A356 aluminum castings and high quality components throughout. Recommended for street, towing, or street/strip engines with displacements up to 468 cubic inches, operating up to 6200 RPM. Also available with 100% CNC chambers for increased air flow (see chart). Component upgrades and machining options are available to customize AFR Heads to your specific build.
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Description

Small Port, High Velocity, Torque Monster!
Want to wake up the Big Block in your favorite tow vehicle? AFR's 265cc high velocity oval port and CNC Chambers is just the ticket! They are also ideal on smaller cubic inch street performance applications (up to 468 CID), providing “gobs” of bottom end torque, tremendous throttle response, and great all around power. With AFR’s trademark 3/4” deck, reinforced rockerstud bosses, and thick rugged castings, you can own the strongest and most efficient heads on the market today. Take note the higher flowing exhaust ports are raised .375 over stock location, and therefore these heads might not be a direct bolt-on in every application. These heads have no EGR and are not emissions legal.

Included Components  
75% CNC Ported Exhaust Ports (Bowl Blend)
80% CNC Ported Intake Ports (Bowl Blend)
100% CNC Chambers
Competition 5-angle Valve Job
 

Recommended Components
Intake Port Gasket AFR #6863
Exhaust Port Gasket AFR #6858
Head Gasket  Fel-Pro #1017-1 (Mark IV) or AFR #6850
Head Gasket  Fel-Pro #1047 (Mark V and VI) or AFR #6849
Head Bolts ARP 135-3703 (Mark IV) or AFR #6306
Head Bolts ARP 135-3707 (Mark V) or AFR #6308
Head Studs ARP 235-4713 or AFR #6307
Head Bolt Washers Manley, AFR #6320
Stud Girdle, (AFR Specific) AFR #6202
7/16 Stud Mount Rocker Arms - 1.7 Ratio (For Optimized Geometry) AFR #6043
1.7 Shaft Mount Rocker Arms T&D AFR #6065
Shaft Mount Rocker Arms Crower or Jesel Pro Series
Suggested Manifold Victor Jr
Suggested Manifold RPM Performer
Suggested Manifold Air Gap #7561
Spark Plug Starting Range Autolite 3924
Specifications & Features
Material A356 Aluminum
Intake Port Volume 265cc
Intake Port Dimension 2.030"H x 1.830"W x1/2 Radius
Intake Port Location Stock
Exhaust Port Volume 132cc
Exhaust Port Dimension 1.770"H x 2.010" W
Exhaust Port Location .375" Raised
Combustion Chamber Size (Partial CNC) 109cc
Combustion Chamber Size (Full CNC) 112cc
Valve Cover Bolt Pattern Perimeter Bolt
Valve Angle 24°/4° Int, 15°/4° Exh
Valve Spring Pocket Diameter 1.725" O.D
Max Valve Spring Pocket Machining 1.750" O.D
Deck Thickness .750"
Minimum Bore Diameter 4.125"
Flat Mill .006" per cc/ Maximum 102cc as cast or CNC chamber
Angle Mill .009" per cc/ Maximum 97cc as cast or CNC chamber
Minimum Cross Sectional Area 2.640 sq. in.
Spark Plug Dimensions 14mm x .750" w/Gasket Seat
IMPORTANT: 
Do not match your intake manifold to any Fel-Pro gasket as it does not precisely match AFR heads. 
Do not use your AFR gasket as a template to port match your intake manifold as one AFR gasket is used for many AFR runner volumes.

NOTE: 
1" longer head bolts needed on four bottom exhaust bolt holes. 
Milling head deck will affect flow numbers. Angle mills might require a .120 thick intake gasket.

Details

Shipping Information

  • Item Requires Shipping
  • 80.0 lbs.
  • W24.0000” x H12.0000” x L24.0000”
  • Free Basic Shipping
  • This item ships in its own box.
  • FREE continental USA ground shipping on ALL AFR Cylinder Heads

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