Engines and Components› Camshafts and Valvetrain
COMP Cams
COMP Cams LifterFS Retro-Fit Hyd Rlr Fu
SKU: C007 8931-2
Moderate — 2–4 hours
Description
Part #: 8931-2
Pro Magnum Hydraulic Roller Lifters Ford Small block 221-351W. A retro-fit lifter for early model blocks equipped with a standard hydraulic cam. COMP Cams Pro Magnum Hydraulic Roller Lifters are specifically designed to perform at higher engine speeds. When engines are equipped with a hydraulic Camshaft, high rpm is limited by the improper position of the internal piston as the lifter inevitably "pumps up". This improper location results in open valves and therefore leads to lost power or sometimes even engine failure.
COMP Cams Retro-Fit Hydraulic Roller Lifters for Ford 289-302 Small Block and 351 Windsor Non-Roller Engines, Single Pair
This product may expose you to chemicals known to the State of California to cause cancer, birth defects, or other reproductive harm.
MIA's 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 8931-2 |
Videos
COMP Cams Hydraulic Roller Lifter Retro-fit Ford 289 302 Stroker Rebuild part 2
COMP Cams #Techtips: Hydraulic Roller Lifters
How to Convert From Flat-Tappet to a Roller Camshaft
Ford 351W roller cam retrofit kit. Comp Cams kit SK35-427-8 and kit 31-1000.
COMP Cams Evolution™ Hydraulic Roller Lifters
HOW TO INSTALL A COMP CAMS ROLLER CAM RETRO FIT KIT.
COMP Cams New Evolution Lifters
Comp Cams Hydraulic Roller Lifter Failure
Hydraulic Roller Lifters: 101
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