Proflow Cylinder Heads, AirMax 185, 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
Material A356 Aluminum
Intake Port Volume 185cc
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 63cc
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"
Spring Rate 310 lbs
Installed Height Intake 1.850" @125 lbs
Installed Height Exhaust 1.850" @ 140 lbs

 

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
Head Bolt Washers Manley

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