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COMP Cams Mutha" Thumpr Hydraulic Flat Tappet Camshaft Complete Kit Lift .489"/.476" Duration 287/305 RPM Range 2200 to 6100

249-K12-601-4


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Mutha" Thumpr Hydraulic Flat Tappet Camshaft Complete Kit Lift .489"/.476" Duration 287/305 RPM Range 2200 to 6100
$560.95
Mutha' Thumpr Hydraulic Flat Tappet Camshaft Complete Kit
Lift .489"/.476"
Duration 287/305
RPM Range 2200 to 6100
Free Shipping - Estimated to ship direct from manufacturer on 05/26/25 , pending manufacturer availability. Learn More

Thank you! We will notify you when this product becomes available.

QTY

Will this work with a L98 with carb/efi

Asked by: Drit
The Comp 249-K12-601-4 cam kit does not work with factory EFI.
Answered by: jshook
Date published: 2025-05-09

I have a 95 350 motor im changing to carburetor with manual fuel pump and look for a thumper can with this work if not can you point me in the right direction

Asked by: David
COMP Cams K12-601-4 Thumpr Hydraulic Flat Tappet Camshaft kit will work on a 95 350 with 9:1 compression, 2500+ stall, intake, gears, and headers.
Answered by: Seth
Date published: 2025-05-07

Do I need to put in a special stall converter? Installing on a 70’s Chevy sbc 350

Asked by: Chris
The Comp 249-K12-601-4 cam kit will need a 2500 stall converter.
Answered by: jshook
Date published: 2025-03-27

Will this work in a 305 5.0 v8 1988 Chevy caprice ? 

Asked by: Teee
COMP Cams 249-K12-601-4 could be used in a carburated 88 Caprice.
Answered by: Seth
Date published: 2025-03-24

Will this fit a 1987 GMC R3500

Asked by: Ed1985
The Comp 249-K12-601-4 cam kit does not work with the factory EFI on '87 year models.
Answered by: jshook
Date published: 2025-03-19

Will this work with my 1995 350 TBI?

Asked by: Landon
COMP Cams 249-K12-601-4 Camshaft Kit will not work with a TBI fuel injection system.
Answered by: Seth
Date published: 2025-03-17

Will this fit in a 1990 gmc sierra 1500 5.7??

Asked by: Angel
COMP Cams K12-601-4 camshaft will work for a '90 5.7 carbureted engine.
Answered by: Seth
Date published: 2025-03-04

Do I need to change push rods when putting this in my 350 sbc and putting flat tapped lifters, if so which ones would yall recommend?

Asked by: Gabe
The Comp 249-K12-601-4 cam kit uses standard, flat tappet cam pushrods.
Answered by: jshook
Date published: 2025-01-21
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