Thumpr Hydraulic Roller Camshaft GM LS Seires Lift: .553"/.536"
InfoVehicle Info Needed
COMP CAMSPART NUMBER: 249-54-600-11

Thumpr Hydraulic Roller Camshaft GM LS Seires Lift: .553"/.536"

$40495
1 left in stock
ShippingShips on Nov 02, 2026
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GM LS Series Gen III/IV Three-Bolt 8 Cyl. 1997-Present
  • Thumpr
    • Thumpr Hydraulic Roller Camshaft
      GM LS Seires
    • Lift: .553"/.536"
    • Duration: 275°/295°
    • Lobe Separation Angle: 109°
    • RPM Range: 2000-6400

      Specifications:
    • Valve Setting: Intake - Hydraulic, Exhaust - Hydraulic
    • RPM Operating Range: 2000 to 6400
    • Cam Grind Number: 275THR7
    • Duration Advertised: Intake - 275, Exhaust - 295
    • Duration @ .050': Intake - 219, Exhaust - 233
    • Valve Lift: Intake - .553, Exhaust - .536
    • Lobe Separation 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


      High performance street, stock converter ok, best with 2000+ converter and gears, choppy/thumping 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.

      Show More

      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 Length24.2
    Weight9.99 PG
    Part CategoryPerformance Parts
    Exh. Duration @ .050 In. (Deg)233
    Cam StyleHydraulic roller tappet
    Grind Number275THR9
    Exh. Duration Advertised (Deg)295
    Engine Make/SizeChevy 350 Gen III
    Intake Valve Lift With Factory Rocker Arm Ratio (I0.553
    Int. Duration @ .050 In. (Deg)219
    Basic Operating Rpm Range2,000-6,400
    Intake Valve Lift0.553 in (14.046 mm)
    Computer-Controlled CompatibleYes
    Int. Duration Advertised (Deg)275
    Lobe Separation (Deg)109
    Rpm Range2000-6400
    Advertised Duration275 int./295 exh.
    Exhaust Valve Lift With Factory Rocker Arm Ratio (0.536
    UsageStreet/Performance
    Valve Lift With Factory Rocker Arm Ratio0.553 int./0.536 exh.
    Camshaft Gear Attachment3-bolt
    QuantitySold individually
    Exhaust Valve Lift0.536 in (13.614 mm)
    Advertised Intake Duration275
    Intake Duration At 050 Inch Lift219
    Exhaust Duration At 050 Inch Lift233
    Advertised Exhaust Duration295
    Lifter TypeHydraulic Roller
    Duration At 050 Inch Lift219 int./233 exh.
    Valve Springs RequiredYes
    Vendor Part Number54-600-11
    Package Qty1
    Package TypeEA
    No Questions
    No Reviews

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