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COMP Cams 4657-1 Hi-Tech Polylock Adjusting Nut for 1/2" Stud Ultra Pro Magnum Rockers

Manufacturer

Picture for manufacturer COMP Cams

Part Number

4657-1
21 reviews
Sale Price

$15.95

Estimated ship date Friday, November 20

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No Hassle Returns

No Hassle Returns

Live-in-stock inventory

Live-in-stock inventory

Fitment guaranteed

Fitment guaranteed

Product Details

The COMP Cams 4657-1 Hi-Tech Polylock is a precision-engineered rocker arm adjusting nut designed specifically for use with 1/2" stud Ultra Pro Magnum roller rockers. This advanced locking nut ensures secure valve lash settings while preventing unwanted adjustment during high-RPM operation.

Key Features:

  • Polylock design provides superior locking capability without the need for jamming
  • Engineered for 1/2" rocker arm studs on Ultra Pro Magnum rocker systems
  • Maintains consistent valve train geometry under extreme conditions
  • Prevents valve lash changes caused by vibration and thermal cycling
  • Precision-machined threads ensure smooth adjustment and reliable clamping force

The Hi-Tech Polylock design eliminates the need for traditional jam nuts while providing more secure locking action. This makes valve lash adjustments easier and more repeatable, which is critical for maintaining optimal engine performance in high-performance and racing applications.

Products specifications

Adjusting Nut Height

1

Stud Diameter

1/2

Rocker Arm Adjusting Nut Series

Hi-Tech

AMAZON ASIN

B00CWZUTO8

Prop 65

WARNING: Cancer and Reproductive Harm P65Warnings.ca.gov

C.A.R.B. Exempt for Foreign Vehicles Manufactured Before 1967?

Yes, but must meet tailpipe emission standards for year of vehicle.

C.A.R.B. Exempt for On-Road Vehicles?

Yes

C.A.R.B. Exempt for Racing and Off-Road Only Vehicles?

Yes, but must be a race/competition only vehicle.

C.A.R.B. Exemption Reason

No impact on pollution output of vehicle.

C.A.R.B. Exempt for California Certified Vehicles Manufactured Before 1965?

Yes, but must meet tailpipe emission standards for year of vehicle.

C.A.R.B. Exempt for Federally Certified Vehicles Manufactured Before 1967?

Yes, but must meet tailpipe emission standards for year of vehicle.

Awesome so far will see when I receive the Juke exhaust

Very quick and easy. We will see what the product looks like.

I found the tire I needed easily and quickly! Thank you Melissa

One of my items that I ordered arrived in the wrong size. The customer service staff was absolutely fantastic. They sent me return lables and got my new item to me with no problem at all. I will be shopping here again.

easy to use website found what I need

Great service

Very satisfied and very competitive price.

easy to find what you are lokking for and fast shipping.

The prices and shipping are the best that I can find

Best price for this product. Thanks

nice

all good

Please send the one exactly as pictured on the website. Thanks

good

La compra que hice fue muy rápida y sin complicaciones

Best price I found, They actually had the Items I ordered in stock. They send me an email to let me know my order has ship. I am Extremely HAPPY!

Easy product search and checkout process. The Amazon affiliation sealed the deal.

Lowest price I have seen on line. Order was shipped in one day.

Ez website great price

Thanks for the quick and easy experience.

quick and easy!!!!

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