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COMP Cams Thumpr Retrofit Hydraulic Roller Camshafts

4.76 out of 5 stars 33 Customer Reviews

COMP Cams is bringing back the musclecar sound—and it's nastier than ever! Few things grab our attention at a car show or cruise night more than a car with a thumpi

COMP Cams is bringing back the musclecar sound—and it's nastier than ever! Few things grab our attention at a car show or cruise night more than a car with a thumping high performance idle. In an ongoing quest to provide you with the performance and sound you demand, COMP Cams' engineering team proudly introduces the Thumpr retrofit hydraulic roller camshafts. They are a series of camshafts designed for use in engines that were originally equipped with flat tappet camshafts. The lobe profile and grind characteristics 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 cams. They give you a seriously aggressive exhaust note without negatively impacting the power output or streetability of the engine. Thumpr camshafts are available in three different grind profiles. Each one will produce a rough, racy exhaust note and impressive amounts of horsepower and torque within a different rpm range. COMP Cams Thumpr Series camshafts feature a cutting-edge hydraulic roller design that delivers a substantial power increase over identical hydraulic flat tappet grinds—without sacrificing reliability or ease of maintenance.

Results 1 - 25 of 25

COMP Cams Thumpr Retrofit Hydraulic Roller Camshafts 12-600-8

COMP Cams Thumpr Retrofit Hydraulic Roller Camshafts 12-600-8

Camshaft, Hydraulic Roller Tappet, Advertised Duration 283/303, Lift .511/.498, Chevy, Small Block, Each

Part Number: CCA-12-600-8

5.0 out of 5 stars ( 4 )

Estimated Ship Date: Tomorrow

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COMP Cams Thumpr Retrofit Hydraulic Roller Camshafts 35-600-8

Camshaft, Hydraulic Roller Tappet, Advertised Duration 283/303, Lift .531/.515, Ford, 351W, Each

Part Number: CCA-35-600-8

4.86 out of 5 stars ( 7 )

Estimated Ship Date: Tomorrow

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COMP Cams Thumpr Retrofit Hydraulic Roller Camshafts 34-602-9

Camshaft, Hydraulic Roller Tappet, Advertised Duration 299/319, Lift .579/.563, Ford, Big Block 385, Each

Part Number: CCA-34-602-9

Not Yet Reviewed

Estimated Ship Date: Tomorrow

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COMP Cams Thumpr Retrofit Hydraulic Roller Camshafts 11-602-8

Camshaft, Hydraulic Roller Tappet, Advertised Duration 299/319, Lift .570/.554, Chevy, Big Block, Each

Part Number: CCA-11-602-8

5.0 out of 5 stars ( 2 )

Estimated Ship Date: Tomorrow

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Estimated Ship Date: Tomorrow

COMP Cams Thumpr Retrofit Hydraulic Roller Camshafts 11-600-8

Camshaft, Hydraulic Roller Tappet, Advertised Duration 283/303, Lift .547/.530, Chevy, Big Block, Each

Part Number: CCA-11-600-8

3.5 out of 5 stars ( 2 )

Estimated Ship Date: Tomorrow

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Estimated Ship Date: Tomorrow

COMP Cams Thumpr Retrofit Hydraulic Roller Camshafts 12-601-8

Camshaft, Hydraulic Roller Tappet, Advertised Duration 291/311, Lift .521/.507, Chevy, Small Block, Each

Part Number: CCA-12-601-8

4.8 out of 5 stars ( 5 )

Estimated Ship Date: Tomorrow

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Estimated Ship Date: Tomorrow

COMP Cams Thumpr Retrofit Hydraulic Roller Camshafts 12-602-8

Camshaft, Hydraulic Roller Tappet, Advertised Duration 299/319, Lift .531/.517, Chevy, Small Block, Each

Part Number: CCA-12-602-8

5.0 out of 5 stars ( 7 )

Estimated Ship Date: Tomorrow

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Estimated Ship Date: Tomorrow

COMP Cams Thumpr Retrofit Hydraulic Roller Camshafts 32-601-8

Camshaft, Hydraulic Roller Tappet, Advertised Duration 291/311, Lift .567/.551, Ford, Cleveland, Modified, Each

Part Number: CCA-32-601-8

3.0 out of 5 stars ( 1 )

Estimated Ship Date: Sep 24, 2025 if ordered today

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Estimated Ship Date: Sep 24, 2025 if ordered today

COMP Cams Thumpr Retrofit Hydraulic Roller Camshafts 42-602-11

Camshafts, Thumpr Retrofit Hydraulic Roller, Advertised Duration 299/319, Lift 0.552/0.537, Very Rough Idle, Needs 9.5:1 Compression, Olds V8, Each

Part Number: CCA-42-602-11

Not Yet Reviewed

Estimated Ship Date: Sep 26, 2025 if ordered today

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Estimated Ship Date: Sep 26, 2025 if ordered today

COMP Cams Thumpr Retrofit Hydraulic Roller Camshafts 11-601-8

Camshaft, Hydraulic Roller Tappet, Advertised Duration 291/311, Lift .558/.542, Chevy, Big Block, Each

Part Number: CCA-11-601-8

5.0 out of 5 stars ( 1 )

Estimated Ship Date: Tomorrow

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Estimated Ship Date: Tomorrow

COMP Cams Thumpr Retrofit Hydraulic Roller Camshafts 34-601-9

Camshaft, Hydraulic Roller Tappet, Advertised Duration 291/311, Lift .567/.551, Ford, 429, 460, Each

Part Number: CCA-34-601-9

Not Yet Reviewed

Estimated Ship Date: Sep 25, 2025 if ordered today

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Estimated Ship Date: Sep 25, 2025 if ordered today

COMP Cams Thumpr Retrofit Hydraulic Roller Camshafts 34-600-9

Camshaft, Hydraulic Roller Tappet, Advertised Duration 283/303, Lift .557/.539, Ford, Big Block 385, Each

Part Number: CCA-34-600-9

Not Yet Reviewed

Estimated Ship Date: Tomorrow

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Estimated Ship Date: Tomorrow

COMP Cams Thumpr Retrofit Hydraulic Roller Camshafts 23-600-9

Camshaft, Hydraulic Roller Tappet, Advertised Duration 283/303, Lift .513/.498, Chrysler, Big Block, Each

Part Number: CCA-23-600-9

Not Yet Reviewed

Estimated Ship Date: Sep 26, 2025 if ordered today

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Estimated Ship Date: Sep 26, 2025 if ordered today

COMP Cams Thumpr Retrofit Hydraulic Roller Camshafts 20-603-9

Camshaft, Hydraulic Roller Tappet, Advertised Duration 299/319, Lift .533/.519, Mopar, Small Block, Each

Part Number: CCA-20-603-9

5.0 out of 5 stars ( 1 )

Estimated Ship Date: Sep 25, 2025 if ordered today

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Estimated Ship Date: Sep 25, 2025 if ordered today

COMP Cams Thumpr Retrofit Hydraulic Roller Camshafts 31-601-8

Camshaft, Retro-Hydraulic Roller, Advertised Duration 291/311, Lift .540/.526, Ford, Small Block, Kit

Part Number: CCA-31-601-8

Not Yet Reviewed

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COMP Cams Thumpr Retrofit Hydraulic Roller Camshafts 51-601-11

Camshaft, Hydraulic Roller Tappet, Advertised Duration 291/311, Lift .522/.508, Pontiac, V-8, Kit

Part Number: CCA-51-601-11

Not Yet Reviewed

Estimated Ship Date: Sep 26, 2025 if ordered today

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Estimated Ship Date: Sep 26, 2025 if ordered today

COMP Cams Thumpr Retrofit Hydraulic Roller Camshafts 32-600-8

Camshaft, Hydraulic Roller Tappet, Advertised Duration 283/303, Lift .557/.539, Ford, Cleveland, Modified, Each

Part Number: CCA-32-600-8

Not Yet Reviewed

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COMP Cams Thumpr Retrofit Hydraulic Roller Camshafts 20-601-9

Camshaft, Hydraulic Roller Tappet, Advertised Duration 291/311, Lift .522/.509, Mopar, Small Block, Each

Part Number: CCA-20-601-9

Not Yet Reviewed

Estimated Ship Date: Sep 24, 2025 if ordered today

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Estimated Ship Date: Sep 24, 2025 if ordered today

COMP Cams Thumpr Retrofit Hydraulic Roller Camshafts 23-602-9

Camshaft, Hydraulic Roller Tappet, Advertised Duration 299/319, Lift .532/.519, Chrysler, Big Block, Each

Part Number: CCA-23-602-9

Not Yet Reviewed

Estimated Ship Date: Tomorrow

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Estimated Ship Date: Tomorrow

COMP Cams Thumpr Retrofit Hydraulic Roller Camshafts 35-601-8

Camshaft, Hydraulic Roller Tappet, Advertised Duration 291/311, Lift .541/.526, Ford, 351W, Each

Part Number: CCA-35-601-8

4.5 out of 5 stars ( 2 )

Estimated Ship Date: Tomorrow

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Estimated Ship Date: Tomorrow

COMP Cams Thumpr Retrofit Hydraulic Roller Camshafts 20-600-9

Camshaft, Hydraulic Roller Tappet, Advertised Duration 283/303, Lift .513/.498, Mopar, Small Block, Each

Part Number: CCA-20-600-9

Not Yet Reviewed

Estimated Ship Date: Sep 26, 2025 if ordered today

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Estimated Ship Date: Sep 26, 2025 if ordered today

Need It Sooner? We recommend these similar substitute parts:

Howards Cams Retrofit Hydraulic Roller Camshafts 712105-10

Not Yet Reviewed

Estimated Ship Date: Tomorrow

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COMP Cams Thumpr Retrofit Hydraulic Roller Camshafts CL33-600-11

Camshaft Kits, Thumpr Retrofit Hydraulic Roller Camshafts, Advertised Duration 283/303, Lift 0.557/0.539, Lifters, Ford, Big Block FE, Kit

Part Number: CCA-CL33-600-11

Not Yet Reviewed

Estimated Ship Date: Sep 24, 2025 if ordered today

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Estimated Ship Date: Sep 24, 2025 if ordered today

COMP Cams Thumpr Retrofit Hydraulic Roller Camshafts 31-600-8

Camshaft, Retro-Hydraulic Roller, Advertised Duration 283/303, Lift .531/.515, Ford, Small Block, Kit

Part Number: CCA-31-600-8

5.0 out of 5 stars ( 1 )

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Need It Sooner? We recommend these similar substitute parts:

Summit Racing™ 303 Plus Camshaft for Ford 5.0L HO SUM-8900

4.25 out of 5 stars ( 9 )

Estimated Ship Date: Tomorrow

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COMP Cams Thumpr Retrofit Hydraulic Roller Camshafts K34-601-9

Cam and Lifters, Hydraulic Roller Tappet, Advertised Duration 291/311, Lift .567/.551, Ford, 429, 460, Kit

Part Number: CCA-K34-601-9

Not Yet Reviewed

Estimated Ship Date: Sep 24, 2025 if ordered today

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Estimated Ship Date: Sep 24, 2025 if ordered today

COMP Cams Thumpr Retrofit Hydraulic Roller Camshafts 32-602-8

Camshaft, Hydraulic Roller Tappet, Advertised Duration 299/319, Lift .579/.563, Ford, Cleveland, Modified, Each

Part Number: CCA-32-602-8

Not Yet Reviewed

Estimated Ship Date: Sep 24, 2025 if ordered today

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Estimated Ship Date: Sep 24, 2025 if ordered today

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