Engines and Components› Camshafts and Valvetrain
COMP Cams
Big M-Thumpr 243/257 Hyd Rollr K-Kit SBC
SKU: C007 K12-602-8
Moderate — 2–4 hours
Description
Fitment
Fitment Guaranteed
Don’t gamble
on fit.
Log your build in the MOTORMIA app and we’ll guarantee this part fits your exact setup — or your money back, return shipping covered.
Available on iOS & Android
Specifications
| Brand | COMP Cams |
| Part Number | C007 K12-602-8 |
Videos
How to Convert From Flat-Tappet to a Roller Camshaft
Mutha Thumpr Roller cam Sounds great 👍 350 Chevy/440 HP #musclecarengines
81' Z28 - 381 stroker - custom build - big Mutha thumpr cam.
1972 C10 Short Bed PATINA Big Mutha Thumper CAM
Comp Cams Thumpr vs. Xtreme Cam Sound Comparison
Comp Cams Mutha' Thumpr Cam installed in a SBC
Thumpr Cam Dyno (Full Version)
Chevy K10 comp cam XE262H with Flowmaster 40s
Comp Cams Mutha’ Thumpr 235/249 Hydraulic Flat Cam for Small Block Chevy 262-400 - HP Gains & More
HOW TO: EASY & CHEAP SBC CAM UPGRADE-DO THEY WORK?
Small Block Chevy Engine Build: The Camshaft
Thumpr Cam Install In A G-Body Malibu
Chevy 305 with a comp thumper cam
81' Z28 - 381 stroker - custom build - big Mutha thumpr cam.
We Installed A (Mutha Thumpr Cam) In The 350 Chevy For (Patches)
Buy with Confidence
Built for enthusiasts. Every order is backed by our 30 day return window on eligible items. Unused and uninstalled products may be returned with approved RMA and no restocking fees when received in new condition. Orders placed through the MOTORMIA app with a complete build qualify for our Fitment Guarantee — free return shipping if the part doesn’t fit your exact setup. The guarantee covers fit only; installation must follow manufacturer instructions, and we recommend a qualified shop for parts marked Difficulty 4–5.
View Full Return Policy