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Cylinder heads Chev BB AFR Magnum 24 degree alloy complete (


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Part No: AFR3670
Cylinder heads Chev BB AFR Magnum 24 degree alloy complete (pair) 112cc Chamber 2.30 intake 1.88 exhaust valves oval port 300cc intake runner 100% CNC ported suit hydraulic roller cam applications up to .725" max lift & upto 540ci AFR 3670
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AFR BBC Magnum 24 Cylinder Head 300cc Oval Port

Recommended for agressive street, street/strip or race big block chevys with displacements up to 540 cubic inches operating at or below 6800 RPM. The 300cc oval port cylinder heads feature 100% CNC machined intake runners exhaust ports and combustion chambers; our 300cc oval port flows 388 CFM at 0.700" lift and is the ultimate street/race weapon without having to step up to a rectangular port design.

Specifications:
Material: A356 Aluminum
Intake Port Volume: 300cc
Intake Port Dimension: 2.055"H x 1.840"W x1/2 Radius
Intake Port Location: Stock
Exhaust Port Volume: 135cc
Exhaust Port Dimension: 1.770"H x 2.010" W
Exhaust Port Location: .375" Raised
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: 4.250"
Flat Mill .006" per cc/ Maximum 102cc
Angle Mill .009" per cc/ Maximum 97cc
Note:Angle mills might require a .120" Thick intake gasket.
Minimum Cross Sectional Area 3.020 sq. in.
Spark Plug Dimensions 14mm x .750" w/Gasket Seat



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