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Product Summary

302, 327, 350, 400, Assembled Cylinder Head Style

    Key Specs

    Cylinder Head StyleAssembled
    Material TypeAluminum
    FinishNatural
    Combustion Chamber Volume64cc
    Intake Runner Volume220cc

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    Edelbrock 61259 Details

    Edelbrock Part # 61259 Victor Jr. 23° 220 cylinder heads are designed for small-block Chevy Its 64cc combustion chamber yields around 10:1 compression ratio in a typical flat-top application and about 12.5:1 when used with some of the most common 12cc dome pistons. One of the key features of the Victor Jr. 23° 220 cylinder heads is the CNC machined chambers and bowls, which result in consistency and improved performance. They also feature angled spark plug holes and maintain the stock 23° valve angle as well as the intake flange bolt pattern for use with 1986 and earlier intake manifolds. All of this allows these cylinder heads to deliver 530-580 hp potential right-out-of-the-box, making them ideal for a budget-minded engine build desiring a high-quality cylinder head that still uses a stud and guide plate rocker system.

    Cylinder Head Specifications:

    • Finish: Satin
    • Designed for use with Mechanical Roller camshafts
    • Combustion chamber volume: 64cc
    • Intake runner volume: 220cc
    • Exhaust runner volume: 85cc
    • Intake valve diameter: 2.10"
    • Exhaust valve diameter: 1.60"
    • Valve stem diameter: 5/16”
    • Valve guides: Manganese bronze
    • Deck thickness: 11/16”
    • Valve spring diameter: 1.55"
    • Valve spring maximum lift: .670"
    • Rocker stud: 7/16"
    • Guide plate: Hardened steel
    • Pushrod diameter: 5/16"
    • Valve angle: 23°
    • Exhaust port location: Raised .300”
    • Spark plug fitment: 14mm x .750 reach, gasket seat

    Cylinder Head Specifications:

    • Finish: Satin
    • Combustion chamber volume: 64cc
    • Intake runner volume: 220cc
    • Exhaust runner volume: 85cc
    • Intake valve diameter: 2.10"
    • Exhaust valve diameter: 1.60"
    • Valve stem diameter: 5/16”
    • Valve guides: Manganese bronze
    • Deck thickness: 11/16”
    • Rocker stud: 7/16"
    • Guide plate: Hardened steel
    • Pushrod diameter: 5/16"
    • Valve angle: 23°
    • Exhaust port location: Raised .300”
    • Spark plug fitment: 14mm x .750 reach, gasket seat

    Charts

    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.

    Edelbrock 61259 Specifications

    KEY SPECS
    MFG. Part #61259
    BrandEdelbrock
    Cylinder Head StyleAssembled
    Material TypeAluminum
    FinishNatural
    Combustion Chamber Volume64cc
    Intake Runner Volume220cc
    GENERAL
    Exhaust Runner Volume85cc
    Combustion Chamber StyleHeart
    CNC-Machined RunnersNo
    CNC-Machined Combustion ChamberYes
    Spark Plug StyleAngle
    Intake Port ShapeRectangle
    Intake Port LocationStandard
    Exhaust Port LocationRaised
    Intake Valve Diameter2.1"
    Intake Valves IncludedYes
    Intake Valve Angle23 °
    Exhaust Valve Diameter1.6"
    Exhaust Valves IncludedYes
    Valve Spring IncludedYes
    Spring Diameter1.55"
    Damper Spring IncludedYes
    Number of Springs Per ValveDual
    Maximum Lift0.7"
    Valve Stem Seals IncludedYes
    Valve Stem Seal TypePositive Stop
    Locks IncludedYes
    Lock Style7 Degree
    Retainers IncludedYes
    Retainer MaterialSteel
    Guideplates IncludedYes
    Guideplate Pushrod Size0.312"
    Rocker Arms IncludedNo
    Rocker Arm Studs IncludedYes
    Rocker Arm Nuts IncludedNo
    Accessory Bolt Holes DrilledYes
    Valve Cover Mounting StylePerimeter Bolt
    Sold in QuantityEach
    GTIN Code085347612598