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    Comp Cams

    Camshaft, Comp Cams Thumpr, Big Mutha Thumpr CL-Kit, SBC, Hyd Roller

    Vehicle Specific fits 8 models
    0 Reviews
    Part# CL86028
    You Save $61.96
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    Ships direct from manufacturer

    Comp Cams is bringing the muscle car sound back, and it is nastier than ever! The lobe profile and grind characteristics of these new Thumpr camshafts use a combination of an early exhaust valve opening, a long exhaust duration and a generous amount of intake and exhaust overlap to maximize the rough-idling characteristics of the camshafts. This gives you a seriously aggressive exhaust note without negatively impacting the power output or streetability of the engine. Thumpr camshafts are available in different grind profiles, each one producing a rough, racy exhaust note while still providing impressive gains in horsepower and torque.


    • APPLICATION FOOTNOTES: [7] Stock springs cannot be used. [10] Requires thrust button & wear plate. [46] Must use bronze tip fuel pump pushrod when using high pressure or high volume pump.
    • NOTE: Not CARB Legal.
    • SHIP NOTE: This item is SPECIAL ORDER and will be drop-shipped from the manufacturer.
    WARNING: This product can expose you to chemicals including lead, sulfur, nickel, chromium, vanadium, titanium, polyvinyl chloride, and 4,4’-methylenebis (2-chloroaniline), which are known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to

    Vehicle Fitment

    Make & Model Year Range Application Details
    Buick Grand National 82 hydraulic roller [7]
    Buick Grand National 84-87 hydraulic roller [7]
    Buick Regal 78-87 hydraulic roller [7]
    Buick T-Type 83-87 hydraulic roller [7]
    Chevrolet Chevelle 64-77 hydraulic roller [7]
    Chevrolet El Camino 64-88 hydraulic roller [7]
    Chevrolet Malibu 78-83 hydraulic roller [7]
    Chevrolet Monte Carlo 70-88 hydraulic roller [7]
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    Camshaft, Comp Cams Thumpr, Big Mutha Thumpr CL-Kit, SBC, Hyd Roller
    Comp Cams Camshaft, Comp Cams Thumpr, Big Mutha Thumpr CL-Kit, SBC, Hyd Roller