Proflow Cylinder Heads, AirMax 185 CNC, SB Ford 289, 302, Aluminum, Assembled 7

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Proflow Cylinder Heads, AirMax 185 CNC, SB Ford 289, 302, 351W, Assembled Proflow does not sacrifice quality for a low price--you get both with our aluminium cylinder heads. The lightweight heads are cast from A-356 aluminium alloy with a large choice of Engine, for SB & BB Chevrolet, LS Chev Holden Ford SB 289-351W, 302,351 Cleveland 2V & 3V & BB FE, and Chrysler SB & BB, phosphorous bronze valve guides, and ductile iron valve seats for use with unleaded gas. They're also end-milled and drilled for accessories. The fully assembled heads have stainless steel valves, High Performance valve springs, 7 degree valve locks, rocker arm studs, and guideplates. Perfect for your Mild or High performance Hot Rod. Note: We suggest using Proflow Head Bolt Stepped washers part number PFEAHF-HBW. Proflow head bolt insert washers are designed to be used on Ford Windsor cylinder heads in applications where you have 7/16" head bolts being used in 1/2" bolt holes. This stops the head bolt hole distorting on aluminium heads when using 7/16'' bolts on 289 / 302 standard Windsor blocks. Specifications & Features: Material A356 Aluminum Intake Port Volume 190cc Intake seat size 2.02 Exhaust seat size 1.60 Intake Port Dimension 2.045" H x 1.205" W x 3/8 Radius Intake Port Location Stock Exhaust Port Volume 70cc Exhaust Port Dimension 1.355" H x 1.360" W Exhaust Port Location Stock Combustion Chamber Size 58cc 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 Max (from 58cc); 68cc Max (from 72cc); Angle Mill .009" per cc 48cc Max (from 58cc); 62cc Max (from 72cc) Note:Angle mills might require a .120" Thick intake gasket. Minimum Cross Sectional Area 2.025 sq. in. Spark Plug Dimensions 14mm x .750" w/Gasket Seat Head Bolt Diameter 1/2" Stud Mount - Non-Emissions Legal Recommended Components: Intake Port Gasket, Fel-Pro #1262 Important: Do not port match your intake manifold to Fel-Pro gasket as it does not precisely fit the heads. Exhaust Port Gasket, Fel-Pro #1415 Head Gasket, 302/351W, Fel-Pro #1011-1 SB Ford 1/2" Bolt Head Bolts, ARP #154-3603 SB Ford 1/2" Bolt Head Studs, ARP #254-4503 1/2" Bolt - 7/16" Thread Head Bolts, 289/302W: ARP 254-3708