Big Mutha Thumpr Retro-Fit Hydraulic Roller Camshaft Complete Kit Lift: .533"/.519"
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COMP CAMSPART NUMBER: 249-K12-602-8

Big Mutha Thumpr Retro-Fit Hydraulic Roller Camshaft Complete Kit Lift: .533"/.519"

$1,83395
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Chevy 262-400ci Small Block 1958-98 Non-Factory Roller Block
  • Big Mutha Thumpr
    • Big Mutha Thumpr Retro-Fit Hydraulic Roller Camshaft Complete Kit
    • Lift: .533"/.519"
    • Duration: 299°/319°
    • Lobe Separation Angle: 107°
    • RPM Range: 2500-6200

      Valve Setting: Intake - Hyd, Exhaust - Hyd
      RPM Operating Range: 2500 to 6200
      Cam Grind Number: 299THR7
      Duration Advertised: Intake - 299, Exhaust - 319
      Duration @ .050': Intake - 243, Exhaust - 257
      Valve Lift: Intake - .531, Exhaust - .517
      Lobe Sep. Angle: 107°

      265, 283, 307, 302, 305, 327, 350, 383, 400, 427, L46, L48, L65, LM1, LT-1, L82, L81, LS9, L83, L98, L05, LG3, LG4, LT1, LT4, Camaro, Corvette, Chevelle, Stingray, Silverado, C10, Firebird, Chevrolet, Chevy, Small Block Chevy, Caprice, Malibu, Impala, Nova, 355, GEN1, Monte Carlo, S10


      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 Kit
    Product LineComp Cams Thumpr Hydraulic Roller Cams
    BrandCOMP CAMS
    Package Height5.2
    Package Width10.3
    Package Length25.7
    Weight24.3 PG
    Part CategoryPerformance Parts
    Exh. Duration @ .050 In. (Deg)257
    Cam StyleHydraulic roller tappet
    Grind Number299THR7
    Exh. Duration Advertised (Deg)319
    Locks IncludedYes
    Engine Make/SizeChevy Small Block (262-400)
    Retainers IncludedYes
    Intake Valve Lift With Factory Rocker Arm Ratio (I0.531
    Int. Duration @ .050 In. (Deg)243
    Assembly Lubricant IncludedNo
    Basic Operating Rpm Range2,500-6,200
    Pushrods IncludedNo
    Gaskets IncludedNo
    Rocker Arms IncludedNo
    Intake Valve Lift0.531 in (13.487 mm)
    Computer-Controlled CompatibleNo
    Int. Duration Advertised (Deg)299
    Lobe Separation (Deg)107
    Rpm Range2500-6200
    Lifter StyleHydraulic roller
    Advertised Duration299 int./319 exh.
    Exhaust Valve Lift With Factory Rocker Arm Ratio (0.517
    Valve Springs IncludedYes
    UsageStreet/Strip
    Valve Lift With Factory Rocker Arm Ratio0.531 int./0.517 exh.
    QuantitySold as a kit
    Valve Stem Seals IncludedYes
    Exhaust Valve Lift0.517 in (13.132 mm)
    Advertised Intake Duration299
    Intake Duration At 050 Inch Lift243
    Exhaust Duration At 050 Inch Lift257
    Timing Chain StyleDouble roller
    Timing Chain And Gears IncludedYes
    Advertised Exhaust Duration319
    Lifter TypeHydraulic Roller Retrofit
    Part FitmentSemi Universal
    Duration At 050 Inch Lift243 int./257 exh.
    Valve Springs RequiredNo
    Lifters IncludedYes
    Vendor Part NumberK12-602-8
    Package Qty1
    Package TypeEA
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