Proflow Cylinder Heads, AirMax 180,SB Chev  Aluminium, Assembled, 72cc Chamber

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. 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.

Specifications & Features:    
Material A356 Aluminum  
Intake Port Volume 180cc  
Intake seat size 2.02  
Exhaust seat size 1.6  
Intake Port Dimension 2.050" H x 1.250" W x 5/16° Radius  
Intake Port Location Stock  
Exhaust Port Volume 72cc  
Exhaust Port Dimension 1.450" H x 1.550" W  
Exhaust Port Location 0.100" Raised  
Combustion Chamber  65cc or 72cc  
Valve Cover Bolt Pattern Perimeter Bolt  
Valve Angle 23°  
Valve Spring Pocket Diameter 1.460" O.D  
Max Valve Spring Pocket Machining 1.750" O.D  
Warning: Do not machine spring pad any deeper.    
Deck Thickness .750"  
Minimum Bore Diameter 4.000"  
Flat Mill .006" per cc 60cc Maximum  
Angle Mill .009" per cc 55cc Maximum  
Note: Angle mills might require .120 thick intake gasket.    
Minimum Cross Sectional Area 1.810 sq. in.  
Spark Plug Dimensions 14mm x .750" w/Gasket Seat  
Carb EO# D-250-2  
Straight Plug Angle Plug option  
     
     
Important: Do not port match your intake manifold to Fel-Pro gasket as it does not precisely fit MIC heads.  
8mm Bead Lock Intake Valve, 2.020" x 4.900" Overall Valve Length Ferrea   
8mm Bead Lock Exhaust Valve, 1.600" x 4.950" Overall Valve Length Ferrea   
PAC Racing Spring 1.290" OD Hydraulic Roller Dual Valve Spring,    
140 lbs on seat, .600" maximum lift, Max RPM 6300-6500    
7° Manley Chrome Moly Retainers 1.245" O.D x .885" I.D x .655" I.D    
7° Bead Lock Valve Keepers  
 3/8" Rocker Studs    
 5/16" Guide Plates    
Viton Valve Seals .600" O.D x .495" I.D    
Hardened Valve Spring O.D Locator 1.380" O.D x .570" I.D    
Powder Metallurgy Intake Valve Seats 2.200" O.D x 1.750" I.D x .375" Deep    
Powder Metallurgy  Exhaust Valve Seats 1.696" O.D x 1.325" I.D x .305" Deep

 

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