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

249-12-601-4


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Mutha" Thumpr Hydraulic Flat Tappet Camshaft Lift .489"/.476" Duration 287/305 RPM Range 2200 to 6100
$274.95
3 left in stock
Mutha' Thumpr Hydraulic Flat Tappet Camshaft
Lift .489"/.476"
Duration 287/305
RPM Range 2200 to 6100
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12-601-4 - Comp Cams Thumpr Hydraulic Flat Tappet Cams is rated 5.0 out of 5 by 1.
Rated 5 out of 5 by from Great Cam I bought my camshaft a few weeks ago. I have now installed and wow what a great sound and better performance !! It really woke up my 383 stroker sbc in my '71 c10.
Date published: 2016-05-24
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Can I use retro roller lifters with this cam? 

Asked by: JohnNC
The Comp 249-12-601-4 flat tappet cam does not work with roller lifters.
Answered by: jshook
Date published: 2023-03-25

Do you guys have pre clearneced bearings for this cam?

Asked by: John1019
Most camshafts do not require a pre-clearanced bearing. These are the recommended high performance bearings - https://www.jegs.com/i/JEGS/555/25401/10002/-1
Answered by: Rusty B
Date published: 2018-11-28

i have a small block 350 if i put this cam in will i have to change springs and stuff also or can i put it in and just change lifters and that’s it

Asked by: jody36
Comp Cams states this cam requires a valve spring upgrade. While the stock springs may not coil bind at this lift this cam is designed with aggressive lobe ramps that work best with higher spring pressures than a stock spring provides.
Answered by: Matt_B
Date published: 2018-10-11
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