Product Summary

390, 427, 428, Bare Cylinder Head Style, Aluminum

    Key Specs

    Cylinder Head StyleBare
    Material TypeAluminum
    Combustion Chamber Volume72cc
    Intake Runner Volume170cc

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    Direct bolt-on heads for 1961-76 390-427-428 Ford Stock and Super Stock racers. No port profiling or bowl blending of ports.
    • Out-of-the-Box Bolt-On Performance
    • Valves Promote Excellent Flow For Streetable Power


    CARB Warning

    For race/ off road use only

    Emissions warning: this part only legal for sale or use in California for racing (competition) vehicles which may never be used, registered, or licensed for use upon a public highway. Any other use renders the vehicle tampered and not legal for use on California public highways (any public street or roadway, public dirt road, public park, or publicly maintained right of way open to the use of the public for vehicular travel). Violations subject to $37,500 penalty per violation per vehicle, revocation of registration, loss of use on California public right of ways, and proof of correction for tampering. There are similar restrictions and penalties under federal law and the laws of all other states with penalties under federal law of up to approximately $45,268 per tampered vehicle and/or engine.


    Cylinder Head StyleBare
    Material TypeAluminum
    Combustion Chamber Volume72cc
    Intake Runner Volume170cc
    Speedway Motors Catalog Part #325-60059
    Exhaust Runner Volume125cc
    Combustion Chamber Volume Range70cc - 79cc
    Intake Runner Volume Range170cc - 179cc
    Exhaust Runner Volume Range120cc - 129cc
    CNC-Machined RunnersNo
    CNC-Machined Combustion ChamberNo
    Intake Port LocationStandard
    Exhaust Port ShapeSquare
    Exhaust Port LocationStandard
    Intake Valve Diameter2.09"
    Intake Valves IncludedNo
    Intake Valve Angle13
    Exhaust Valve Diameter1.66"
    Exhaust Valves IncludedNo
    Valve Spring IncludedNo
    Damper Spring IncludedNo
    Machined for O-RingNo
    Valve Seats MachinedNo
    Valve Seat MaterialDuctile Iron
    Valve Stem Seals IncludedNo
    Valve Guides IncludedYes
    Valve Guide MaterialManganese Bronze
    Locks IncludedNo
    Retainers IncludedNo
    Guideplates IncludedNo
    Rocker Arms IncludedNo
    Rocker Arm Studs IncludedNo
    Rocker Arm Nuts IncludedNo
    Oiling StyleThrough Head
    Heat CrossoverNo
    Steam Holes DrilledNo
    Accessory Bolt Holes DrilledYes
    NotesUses 14mm spark plugs with 3/4" reach, and flat gasket seals
    Sold in QuantityEach
    GTIN Code085347600595