Engines and Components› Camshafts and Valvetrain
COMP Cams
Polylocks 1/2 Stud Ultra Pro Mag Rockers
SKU: C007 4657-16
Moderate — 2–4 hours
Description
Part #: 4657-16
Hi-Tech Polylocks/Adjusting Nuts, 1/2" Stud for Ultra Pro Magnum/Ultra Pro Magnum XD Rockers - Set of 16
The best polylock for high end race applications, these Hi-Tech polylocks are designed for 1/2" Ultra Pro Magnum and Ultra Pro Magnum XD rockers.
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 4657-16 |
Videos
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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.
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