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25309 High Performance Camshaft OLDS - 260, 307, 350, 400, 403, 425, 455 (1967–1984)
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MELLINGPART NUMBER: 689-25309

25309 High Performance Camshaft OLDS - 260, 307, 350, 400, 403, 425, 455 (1967–1984)

$31999
ShippingShips on 09/14/2026
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High Performance Camshaft
  • OLDS - 260, 307, 350, 400, 403, 425, 455 (1967–1984)

    Melling 25309 Features:

    Class III camshaft (230°-245°). Rough idle quality. Good mid to high rpm torque and horsepower. For use with manual transmission or high stall automatic. May need improved carb, exhaust system, and ignition system. Combination street and drag. Will have lower vacuum than stock. Melling offers a full line of high perform ance camshafts for domestic cars, light trucks, import vehicles, marine and high performance engines. Melling offers specific high performance camshaft choices for street, RV, strip and circle track racing applications. Melling camshafts supply the performance to suit your horsepower and torque requ irements wherever and whenever you want it. Melling high performance camshafts are developed, engineered, tested and manufactured with the highest standards of quality and materials.

    • Precision engineered for optimum fit and function
    • Manufactured from high quality durable materials for long wear
    • Designed for long-life and worry-free performance
    • Meets or exceeds original equipment specifications
    • Advertised Exhaust Duration: 314 DD
    • Advertised Intake Duration: 314 DD
    • Cam Type: Hydraulic Flat Tappet
    • Computer Controlled Compatible: No
    • Exhaust Duration at .050 inch Lift: 244 DD
    • Exhaust Valve Lift: 0.475 in.
    • Exhaust Valve Lift with Factory Rocker Arm Ratio: 1.6 in.
    • Grade Type: Performance
    • Intake Duration at .050 Inch Lift: 244 DD
    • Intake Valve Lift: 0.475 in.
    • Intake Valve Lift with Factory Rocker Arm Ratio: 1.6 in.
    • Lifter Type: Hydraulic Flat Tappet
    • Lobe Separation: 110 DD
    • Rocker Arm Ratio: 1.6

    Emissions Note:

    This part is only legal for sale and use on Uncontrolled (Non-Emissions Controlled) Vehicles or on vehicles used solely for the purposes of closed competition racing.

    CLICK THIS LINK FOR IMPORTANT CARB & EPA EMISSIONS INFORMATION ABOUT THIS PART

  • Part TypeCamshaft
    BrandMELLING
    Package Width10.31
    Weight10.31 PG
    Part CategoryPerformance Parts
    Rocker Arm Ratio1.6
    Intake Duration At .050 Inch Lift244 DD
    Lobe Separation110 DD
    Exhaust Valve Lift0.475 in.
    Advertised Intake Duration314 DD
    Intake Valve Lift0.475 in.
    Exhaust Valve Lift With Factory Rocker Arm Ratio1.6 in.
    Intake Valve Lift With Factory Rocker Arm Ratio1.6 in.
    Exhaust Duration At .050 Inch Lift244 DD
    Advertised Exhaust Duration314 DD
    Lifter TypeHydraulic Flat Tappet
    Part FitmentDirect Fit
    Computer Controlled CompatibleNo
    Cam TypeHydraulic Flat Tappet
    Grade TypePerformance
    Vendor Part Number25309
    Package Qty1
    Package TypeEA
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    Some parts are not legal for use in California or other states with similar laws / regulations
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