Proflow Cylinder Heads, AirMax 170, SB For Ford 289, 302, 351W, Aluminium, Asse

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Proflow Cylinder Heads, AirMax 170, SB Ford 289, 302, 351W 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 engines, for SB & BB Chevrolet, LS Chev Holden Ford SB 289-351W, 302, 351 Cleveland 2V & 3V & BB FE, and Chrysler SB & BB. They have 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 hole Stops head bolt hole distorting on aluminium heads when using 7/16 bolts on 289 / 302 standard Windsor block Specifications & Features: Material A356 Aluminum Intake Port Volume 175cc(177.4) Intake seat size 2.02 Exhaust seat size 1.60 Intake Port Location Stock Exhaust Port Volume 66cc(66.4) Exhaust Port Location Stock Combustion Chamber Size 60cc Valve Cover Bolt Pattern Perimeter Bolt Valve Angle 20° Valve Spring Pocket Diameter 1.460" O.D(1.55" is available) Deck Thickness 0.75 Spark Plug Dimensions 14mm x .750" Head Bolt Diameter 1/2" Valve Guide material Manganese Bronze Valve Guide I.D 11/32 or 8mm Valve Seat Material Powdered Metal Accessory Bolt Holes Drilled Yes Cylinder Head Finish As Casting Engine Make/Size Ford 5.8L/351W Guideplates Included Yes 5/16 Adjustable Heat Crossover No Lock Style 7 degree Machined for O-Ring No Maximum Valve Lift 0.575 in (14.605 mm) Oiling Style Through pushrod Outside Diameter of Outer Spring 1.46 in (37.1 mm) Package Depth 20 Package Height 7.38 Package Width 13.8 Rocker Arm Nuts Included No Rocker Arms Included No Rocker Studs Included Yes 7/16 Shipping Weight 50 pound Valve Cover Mounting Style Perimeter bolt Valve Guides Included Yes Valve Seat Machine Style 5 ANGLE Valve Seats Machined Yes Installed Spring Height 125lb @ 1.800" Recomended Components Spark Plugs: Champion RC12YC or equivalent Head Bolts: 7/16" ARP 154-3605 1/2" ARP 154-3603 Head Studs: 1/2" ARP 154-4003 Head Gaskets: Fel-Pro 1011-1 Intake Gaskets: Fel-Pro 1250 Exhaust Gaskets: Fel-Pro 1415