Product Summary

396, 402, 427, 454, Assembled Cylinder Head Style

    Key Specs

    Cylinder Head StyleAssembled
    Material TypeAluminum
    Combustion Chamber Volume100cc
    Intake Runner Volume290cc

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    These assembled Performer RPM 454-O High-Compression cylinder heads from Edelbrock are designed for use with Big Block Chevy engines. They feature unique oval intake ports that flow like rectangular ports but with a smaller size to provide exceptional throttle response. Ideal for high-compression applications, these heads feature a 100cc chamber volume and come with ports profiled to increase air flow in a lightweight design.
    • Aluminum, Assembled
    • 100cc Chamber, 295cc Intake
    • Chevy Big Block


    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 Volume100cc
    Intake Runner Volume290cc
    Exhaust Runner Volume110cc
    Combustion Chamber Volume Range100cc - 109cc
    Intake Runner Volume Range290cc - 299cc
    Exhaust Runner Volume Range110cc - 119cc
    CNC-Machined RunnersNo
    CNC-Machined Combustion ChamberNo
    Intake Port ShapeOval
    Intake Port LocationStandard
    Exhaust Port ShapeRound
    Exhaust Port LocationStandard
    Intake Valve Diameter2.19"
    Intake Valves IncludedYes
    Intake Valve Angle26
    Exhaust Valve Diameter1.88"
    Exhaust Valves IncludedYes
    Valve Spring IncludedNo
    Spring Diameter1.55"
    Damper Spring IncludedYes
    Number of Springs Per ValveDual
    Maximum Lift0.700"
    Machined for O-RingNo
    Valve Seat Machine Style3-angle
    Valve Seats MachinedYes
    Valve Seat MaterialDuctile Iron
    Valve Stem Seals IncludedYes
    Valve Stem Seal TypePositive Stop
    Valve Guides IncludedYes
    Valve Guide MaterialManganese Bronze
    Locks IncludedYes
    Lock Style7 Degree
    Retainers IncludedYes
    Retainer MaterialSteel
    Guideplates IncludedYes
    Guideplate Pushrod Size0.375"
    Rocker Arms IncludedNo
    Rocker Arm Studs IncludedYes
    Rocker Arm Nuts IncludedNo
    Oiling StyleThrough Pushrod
    Heat CrossoverNo
    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 Code085347604395