Proflow Cylinder Heads, AirMax 170, Big Block Ford FE ,390-428
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.
Combustion Chamber Volume:
72cc
Intake Runner Volume:
170cc
Exhaust Runner Volume:
125cc
Intake Valve Diameter:
2.09''
Exhaust Valve Diameter:
1.66''
Valve Stem Diameter:
3/8"
Valve Guides:
Manganese bronze
Deck Thickness:
5/8''
Valve Spring Diameter:
1.55"
Valve Spring Maximum Lift:
.600"
Rocker Stud:
N/A
Guideplate:
N/A
Pushrod Diameter:
3/8
Valve Angle:
13°
Exhaust Port Location:
Stock
Spark Plug Fitment:
14mm x 3/4'' Reach,
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