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Product Summary

352, 360, 390, 427, 428, 3000-7000 RPM Range

    Key Specs

    Camshaft TypeSolid Flat Tappet
    RPM Range3000-7000
    Intake Duration (.050" Lift)260
    Exhaust Duration (.050" Lift)260
    Lobe Separation110 °

    Need To Know

    This Product Will Ship Free

    Shipping Policies & FAQs

    Quick and Easy Returns

    Return Policy

    COMP Cams 33-247-4 Details

    33-247-4 - Camshaft, FB 306S-10.

    Magnum Mechanical Flat Tappet Camshafts. Solid-Excellent for Pro Street cars. 3500+ stall or 4 speed 11.5:1 compression, low gears. Radical idle. All COMP Cams Camshafts are manufactured to the strictest tolerances. Rigorously tested and checked for quality.

    • Great high RPM power
    • Easy on valve train parts
    • Can be used with mild ratio rocker arms & traditional performance valve springs
    • Best with aftermarket converter & 9.5:1+ compression

    Application

    1963-70 Mercury 390-428
    1963-76 Ford 352-428

    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.

    COMP Cams 33-247-4 Specifications

    KEY SPECS
    MFG. Part #33-247-4
    BrandCOMP Cams
    Camshaft TypeSolid Flat Tappet
    RPM Range3000-7000
    Intake Duration (.050" Lift)260
    Exhaust Duration (.050" Lift)260
    Lobe Separation110 °
    GENERAL
    Intake Valve Lift w/ Rocker Arm Ratio0.640"
    Exhaust Valve Lift w/ Rocker Arm Ratio0.640"
    Intake Duration306
    Exhaust Duration306
    Sold in QuantityEach
    Grind NumberFB 306S-10
    Intake Valve Lash0.022
    Exhaust Valve Lash0.022
    GTIN Code036584641193
    External Ignition Box RequiredNo
    Valve Springs RequiredYes