Big Mutha Thumpr Hydraulic Roller Camshaft GM LS Seires Lift: .573"/.558"
InfoVehicle Info Needed
COMP CAMSPART NUMBER: 249-54-602-11

Big Mutha Thumpr Hydraulic Roller Camshaft GM LS Seires Lift: .573"/.558"

$32396$404.95You Save$80.99
ShippingShips on Sep 14, 2026
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GM LS Series Gen III/IV Three-Bolt 8 Cyl. 1997-Present
  • Big Mutha Thumpr
    • Big Mutha Thumpr Hydraulic Roller Camshaft
      GM LS Seires
    • Lift: .573"/.558"
    • Duration: 291°/311°
    • Lobe Separation Angle: 109°
    • RPM Range: 2600-6800

    • 1997-Current Three-Bolt 4.8/5.3/5.7/6.0L LS1/Gen III/IV
    • Valve Setting: Intake - Hyd, Exhaust - Hyd
    • RPM Operating Range: 2600 to 6800
    • Cam Grind Number: 283THR7
    • Duration Advertised: Intake - 291, Exhaust - 311
    • Duration @ .050': Intake - 235, Exhaust - 249
    • Valve Lift: Intake - .573, Exhaust - .558
    • Lobe Sep. Angle: 109°

      GM, 4.8, 5.3, 5.7, 6.0, 6.2, 7.0, LS1, LS2, LS3, LS4, LS6, LS7, LSA, LS9, Camaro, Silverado, LS Swap, 383, 350, SBC, Chevelle, Yukon, L92, LM7, 325, GMC, Trailblazer, Corvette, GM LS, GEN III, GEN 3, GEN IV, GEN 4, DOD, AFM, VVT, BTR, Texas Speed


      Street/strip, needs 9.5:1 compression, 2800+ stall, intake, gears and headers, very rough idle.

    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

      Peak Power & Reliability

      The Thumpr line of camshafts is a series of retro-fit hydraulic roller camshafts designed for use in 1955- 1998 262-400 cubic inch Small Block Chevrolet engines equipped with flat tappet camshafts. Thumpr Camshafts possess such an aggressive exhaust note due to the lobe profiles and grind characteristics chosen by the COMP Cams engineers. These camshafts produce a combination of early exhaust valve opening, long exhaust duration, and a generous amount of intake and exhaust overlap to maximize the rough-idling characteristics. Their cutting-edge hydraulic roller design will deliver a substantial power increase over an identical hydraulic flat tappet grind without sacrificing reliability or ease of maintenance. So look no further than the Thumpr line of camshafts - engineered to deliver that much sought-after ''thumping'' idle quality to Small Block Chevy owners everywhere.

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      Camshaft & Lifter Kits are indicated by a CL in their part number and include Camshaft, Lifters, Assembly Lube, Decals, and Instructions.

      Complete Kits are indicated by a K in their part number and include Camshaft, Lifters, Timing Chain & Gears, Valve Springs, Retainers, Locks, Assembly Lube, Decals, and Instructions.

      Unlock serious performance and aggressive sound with the Comp Cams Thumpr Hydraulic Roller Cams—the perfect choice for muscle car enthusiasts and performance builders looking to make a statement. These cams are specifically designed to deliver increased horsepower and torque while providing that signature "thumpy" idle that turns heads at every stoplight.

      Whether you're building a street machine or upgrading your engine for track days, the Thumpr cam gives your vehicle a noticeable boost in performance without compromising reliability. These cams feature a hydraulic roller design that offers superior durability, allowing for better valve control at higher RPMs, reducing friction, and increasing engine efficiency.

      For those seeking an even more aggressive profile, the Mutha Thumpr cam offers an even more intense sound and performance upgrade. With optimized lobe profiles, this cam produces a lopey idle and delivers peak performance at mid to high RPM ranges, ensuring your engine performs at its best when you need it most.

      Perfect for anyone looking to enhance the power, sound, and style of their ride, the Thumper cam is engineered for vehicles with modified cylinder heads, high-compression ratios, and other performance upgrades. Comp Cams delivers exceptional quality and precision, ensuring that these cams will stand the test of time.

      Shop JEGS today to take your engine's performance and sound to the next level with Comp Cams Thumpr Hydraulic Roller Cams—designed for the enthusiast who wants more power and attitude.

    Part TypeCamshaft
    Product LineComp Cams Thumpr Hydraulic Roller Cams
    BrandCOMP CAMS
    Package Height2.8
    Package Width3.0
    Package Length24.3
    Weight9.83 PG
    Part CategoryPerformance Parts
    Exh. Duration @ .050 In. (Deg)249
    Cam StyleHydraulic roller tappet
    Grind Number291THR9
    Exh. Duration Advertised (Deg)311
    Engine Make/SizeChevy 350 LS6
    Intake Valve Lift With Factory Rocker Arm Ratio (I0.573
    Int. Duration @ .050 In. (Deg)235
    Basic Operating Rpm Range2,600-6,800
    Intake Valve Lift0.573 in (14.554 mm)
    Computer-Controlled CompatibleYes
    Int. Duration Advertised (Deg)291
    Lobe Separation (Deg)109
    Rpm Range2600-6800
    Advertised Duration291 int./311 exh.
    Exhaust Valve Lift With Factory Rocker Arm Ratio (0.558
    UsageStreet/Strip
    Valve Lift With Factory Rocker Arm Ratio0.573 int./0.558 exh.
    Camshaft Gear Attachment3-bolt
    QuantitySold individually
    Exhaust Valve Lift0.558 in (14.173 mm)
    Advertised Intake Duration291
    Intake Duration At 050 Inch Lift235
    Exhaust Duration At 050 Inch Lift249
    Advertised Exhaust Duration311
    Lifter TypeHydraulic Roller
    Duration At 050 Inch Lift235 int./249 exh.
    Valve Springs RequiredYes
    Vendor Part Number54-602-11
    Package Qty1
    Package TypeEA
    No Questions
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