LS1 AirMax , Aluminium Cylinder Heads 15deg, Holden Chev, Bare

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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. 

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Proflow’s  AirMax LS1 Cylinder Heads feature our Permanent Mold “As-Cast” Technology surfaces on the intake runners, exhaust runners and combustion chambers that allows for extremely accurate and repeatable port location/performance. This budget friendly head is perfect for your OEM engine operating below 6300 RPM.

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Material Aluminum A356.2 T6

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Combustion Chamber Volume  63cc

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Intake Runner Volume  210cc

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Intake Port Size  H x W 3.19″ x 1.015″

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Inatke Port Height compared to OE Standard

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Exhaust Runner Volume 82cc

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Exhaust Port Size H x W 1.40″ * 1.66″

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Exhaust Port Height compared to OE Standard

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Intake Valve Size 2.020″

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Exhaust Valve Size 1.600″

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Valve Stem Diameter  8.00mm

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Valve Length 4.88

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Valve Angle 15 Degree

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Valve Guide Seal Diameter 0.5″

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Valve Guide Material Manganese Bronze

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Valve Spring Pocket ID 1.50″

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Deck Thicknesss 0.425″

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