Proflow Cylinder Heads, AirMax 200, 535HP, Aluminium, Assembled, 64cc Chamber, Straight Plug, 200cc Intake Runner, SB Chevrolet, Pair
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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.
- Cylinder Head Material: A356.0 Aluminum
- Exhaust Runner Volume: 72cc
- Intake Valve Diameter (in): 2.020", 5.010" Length, 1.720" Installed height with 0.56" Shim
- Exhaust Valve Diameter (in): 1.600", 5.045" Length
- Maximum Valve Lift (in): 0.575 in.
- Number of Springs Per Valve: Dual
- Lock Style: 7 degree
- Valve Stem Diameter: 11/32"
- Valve Stem Seal Style: Viton seal
- Rocker Arm Nut Thread Size: 7/16-24 in.
- Guide plate Pushrod Size: 5/16 in.
- Valve Cover Mounting Style: Perimeter bolt
- Valve Angle: 23 degree
- Valve Guide Material: Manganese bronze
- Valve Seat Machine Style: 3-angle
- Valve Seat Material: Powder Metallurgy
- Steam Holes Drilled: No/ If required
- Oiling Style: Through pushrod
- Valve Spring Style: Standard
- Outside Diameter of Outer Spring: 1.470 in.
- Spring install height: 1.720" @ 116 lbs seat pressure
- Spring Diameter: 1.266"
- Deck Thickness: 0.533"