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COMP Cams Poly Lock 3/8 High Energy Alu

SKU: CCA4631-8

Rocker Arm Nuts

CCA Poly Lock Sets...

COMP Cams Poly Lock 3/8 High Energy Alu

SKU: CCA4631-8

Rocker Arm Nuts

CCA Poly Lock Sets...

A$91.39
Special Order. Contact for ETA. This item is out of stock in our warehouse and partner distribution centres. In some cases, this may be due to not having live inventory feeds available for all suppliers. Please contact us before ordering if you need to meet a specific deadline.

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Description

COMP Cams Poly Lock 3/8 High Energy Alu

COMP Cams' part number 4631-8, High Energy Aluminum Polylocks, 3/8"-1. High Energyâ„¢ Aluminum Polylocks with 3/8" Stud diameter.

Part Type

Engine Rocker Arm Adjusting Nut

Product Overview

*Rocker Arm Adjusting Nuts*
Many of the popular engine families utilize a positive stop type of rocker arm attachment, which does not allow for any adjustment, and consequently there is no consideration for different cam sizes or other modifications to the engine block and heads. For that reason, COMP has designed a kit to convert this setup to a fully adjustable valve train.
• Tapered for extra strength in locking areas
• High Energy and Magnum Polylocks are best for moderate lift and spring pressure applications
• Hi-Tech Polylocks work well in all high end race applications
• Stud girdle polylocks are precision ground for minimum runout

*Rocker Arm Studs*
COMP Cams takes pride in having the finest rocker arm studs available on the market. The High Energy and Magnum series studs work well in applications with moderate lifts and spring pressures and are available in the popular 3/8" and 7/16" sizes. When ultimate strength is required, as with high RPM roller cam applications, the Hi-Tech Race Stud is the answer. This stud has a thin jam nut for rocker clearance, rolled threads for maximum contact and a ground-flat top so that accurate valve adjustment can be achieved and maintained. The diameter of the jam nut is larger in order to spread the load over a larger area. All COMP Cams® studs have generous radii and a black oxide finish.

Data: v4.2 - Upd: 2026-11-07 21:23:31

Features

Images are supplied by the manufacturer and may be generic. While all efforts are made to provide accurate pictures, there may be differences in the actual product, such as colour, quantity, version, or included components. Please carefully review the description and specifications for details on inclusions or any variations. Some items may be sold individually or in sets, and images may occasionally depict additional products or quantities not included in your purchase. For assistance or clarification, please contact customer support.

Specifications

Product Details

Description:1.125" Tall Polylock; For High Energy Aluminum Rockers; 8 Pieces
Part Number:cca4631-8

Product Downloads

# Document Type Download
1. Catalog

Installation guides, warranty details, and other supporting documents are provided by the supplier. In some cases, these files may originate from regions outside your locale, meaning instructions, warranty procedures, and images may not fully align with your specific vehicle or region (e.g., LHD vs. RHD differences, return policies, etc.). If you need clarification, please contact a StreetFX support agent.

Data: v2 - Desc: v4.2 - Upd: 2026-11-07 19:03:51

Reference Information

Reference Data (Provide these details to our support team)
Brand Name/s Comp Cams, Comp Cams (edelbrock)
StreetFX SKU cca4631-8
SFX Item ID 4120126
Accounting SKU cca-4631-8
Manufacturer SKU 4631-8
Manufacturer UPC 036584238195
Alternative References 4631-8, CCA-4631-8

POLYLOCK, 3/8 HIGH ENERGY ALUMINUM

Product Attributes
BrandCOMP Cams
Manufacturer's Part Number4631-8
Part TypeRocker Arm Nuts
UPC036584238195

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