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.

• 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