Proflow Cylinder Heads, SuperMax 220 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 A356.2 Aluminum  
Intake Port Volume 220cc  
Intake seat size 2.08  
Exhaust seat size 1.6  
Intake Port Dimension 2.115" H x 1.300" W x 3/8 Radius
Intake Port Location Stock  
Exhaust Port Volume 70cc  
Exhaust Port Dimension 1.400" H x 1.400" W  
Exhaust Port Location Raised .125"  
Combustion Chamber Size 58cc   
Valve Cover Bolt Pattern Perimeter Bolt  
Valve Angle 20°  
Valve Spring Pocket Diameter 1.580" 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);
Minimum Cross Sectional Area 2.165 sq. in.  
Spark Plug Dimensions 14mm x .750" w/Gasket Seat  
Head Bolt Diameter 1/2"  
7/16 Studs Included 7/16  
Adjustable Guide Plates 5/16  
Recommended Components:    
Intake Port Gasket, 1.200" X 2.000" w/ 3/8" radius, Fel-Pro #1262    
Important: Do not port match your intake manifold to Fel-Pro gasket as it does not precisely fit MIC heads.  
Exhaust Port Gasket, Fel-Pro #1487    
Head Gasket, Fel-Pro #1011-1    
SB Ford 1/2" Bolt Head Bolt Kit, ARP #154-3603    
SB Ford 1/2" Bolt Head Stud Kit, ARP #254-4503    
1/2" Bolt - 7/16" Thread Head Bolts, ARP 254-3708    
Suggested Manifold Super Vic or Vic Jr.  
Spark Plug Starting Range Autolite 3922

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