Big Mutha" Thumpr Hydraulic Flat Tappet Camshaft Lift .531"/.515" Duration 294/312 RPM Range 2500-6400
InfoVehicle Info Needed
COMP CAMSPART NUMBER: 249-32-602-5

Big Mutha" Thumpr Hydraulic Flat Tappet Camshaft Lift .531"/.515" Duration 294/312 RPM Range 2500-6400

$32595
ShippingShips on 09/15/2026
Lowest PriceLowest Price Guarantee

Ford 351C, 351M-400M 8 cyl. 1970-1982
    Big Mutha' Thumpr Hydraulic Flat Tappet Camshaft
    Lift .531"/.515"
    Duration 294/312
    RPM Range 2500-6400

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

    Ford, 351, 351 Cleveland, 400, 351 Modified, 400 Modified, Ford F100, Mach 1, Mustang


    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

Thumpr Camshafts are the hottest cams to hit the streets in more than a decade. That's because they give you the big cam sound you're looking for, without the drawbacks. Applying a camshaft design originally created for sports car endurance racing, they incorporate early exhaust valve opening, long exhaust duration, and a generous amount of intake and exhaust overlap. Best of all, Thumprs will not negatively impact power output or streetability.

Show More Features:
  • Three unique cam designs for each application that deliver excellent horsepower gains and broad torque curve; perfect choice for muscle cars and street rods
  • Early intake valve opening and long exhaust duration create optimum overlap for powerful, hard-hitting exhaust note
  • Best with aftermarket converters and more rear gear

    Thumpr Sound ClipClick to Listen

    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.

The Comp Cams Thumpr Hydraulic Flat Tappet Cams are the perfect solution for muscle car enthusiasts and performance builders seeking that aggressive "thumpy" idle and increased engine power. Engineered to deliver impressive performance without sacrificing drivability, these camshafts are designed for vehicles that demand high-performance upgrades. Whether you're building a street rod, classic muscle car, or high-performance engine, the Thumpr camshaft is the ideal choice for anyone looking to take their ride to the next level.

The Big Mutha Thumpr cam kit is tailored for those looking for a more aggressive, lopey idle while boosting horsepower and torque. These camshafts are specifically designed to provide maximum power and enhanced throttle response, particularly at mid-range RPMs, making them a top choice for street performance builds.

The performance camshaft offers an ideal balance between street-friendly drivability and high-performance capability. With a unique lobe design, the Thumpr camshaft provides an unmistakable sound while increasing airflow and valve timing for more robust power delivery. These camshafts are perfect for enthusiasts who want to enhance both the sound and performance of their engine.

If you're seeking a camshaft that makes your engine roar with authority while delivering tangible performance gains, look no further than the Comp Cams Thumpr Hydraulic Flat Tappet Cams. Upgrade your engine today and experience the difference in power, performance, and sound!

Part TypeCamshaft
Product LineComp Cams Thumpr Hydraulic Flat Tappet Cams
BrandCOMP CAMS
Package Height2.8
Package Width2.9
Package Length24.3
Weight9.87 PG
Part CategoryPerformance Parts
UsageStreet/Strip
Intake Valve Lift0.531 in (13.487 mm)
Int. Duration Advertised (Deg)294
Exh. Duration @ .050 In. (Deg)257
Rpm Range2500-6400
Lifter TypeHydraulic Flat Tappet
Exh. Duration Advertised (Deg)312
Part FitmentSemi Universal
Engine Make/SizeFord 351M-400
Int. Duration @ .050 In. (Deg)242
Exhaust Valve Lift0.515 in (13.081 mm)
Vendor Part Number32-602-5
Package Qty1
Package TypeEA
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