Product Summary

455, Assembled Cylinder Head Style, Aluminum, Natural

    Key Specs

    Cylinder Head StyleAssembled
    Material TypeAluminum
    Combustion Chamber Volume72cc
    Intake Runner Volume215cc

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    These satin assembled aluminum Performer PRM CNC cylinder heads from Edelbrock are direct bolt-on replacements for 1962-79 Pontiac 389-455 cubic inch engines. They feature a CNC machined combustion chamber for improved air flow and the 72cc chamber design is ideal for high compression engines. These heads are equipped with springs for use with hydraulic roller camshafts.
    • Out-of-the-Box Bolt-On Performance
    • Hand-Blended Intake and Exhaust Bowls
    • CNC-Matched Intake/Exhaust Ports in Std Location
    • Thicker Deck Surfaces than Other Brands


    CARB Warning

    For race/ off road use or for use on pre-1966 vehicles.

    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, or if installed in vehicles model-year 1965 or older; motorcycles model-year 1977 or older; or off-highway recreational vehicles (such as off-road motorcycles and all-terrain vehicles) model-year 1996 and older. 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 StyleAssembled
    Material TypeAluminum
    Combustion Chamber Volume72cc
    Intake Runner Volume215cc
    Exhaust Runner Volume175cc
    Combustion Chamber Volume Range70cc - 79cc
    Intake Runner Volume Range210cc - 219cc
    Exhaust Runner Volume Range170cc - 179cc
    CNC-Machined RunnersNo
    CNC-Machined Combustion ChamberYes
    Spark Plug StyleStraight
    Intake Port LocationStandard
    Exhaust Port ShapeRam Air IV
    Exhaust Port LocationStandard
    Intake Valve Diameter2.11"
    Intake Valves IncludedYes
    Intake Valve Angle14
    Exhaust Valve Diameter1.66"
    Exhaust Valves IncludedYes
    Exhaust Valve Angle14
    Valve Spring IncludedYes
    Spring Diameter1.46"
    Damper Spring IncludedYes
    Number of Springs Per ValveDual
    Maximum Lift0.575"
    Machined for O-RingNo
    Valve Seats MachinedYes
    Valve Stem Seals IncludedYes
    Valve Guides IncludedYes
    Valve Guide MaterialManganese Bronze
    Locks IncludedYes
    Retainers IncludedYes
    Guideplates IncludedYes
    Guideplate Pushrod Size0.312"
    Rocker Arms IncludedNo
    Rocker Arm Studs IncludedYes
    Rocker Arm Nuts IncludedNo
    Oiling StyleThrough Head
    Heat CrossoverYes
    Steam Holes DrilledNo
    Accessory Bolt Holes DrilledYes
    Valve Cover Mounting StylePerimeter Bolt
    NotesUses 14mm spark plugs with 3/4" reach, and flat gasket seals
    Sold in QuantityEach
    GTIN Code085347615155