Engine Valve Rotator

Part Type

Engine Valve Spring Seat

Product Overview

*Valve Spring Shims and Kits*
• Equalize installed height of valve spring
• Engineered from the highest quality shim stock
• Heat-treated to withstand radical camshaft lobes
• Available in three different thicknesses to help achieve proper valve spring height
• Shim kits contain (16) pieces of each thickness listed

*Big Block Chevrolet Seat Spacers*
Late model Big Block Chevrolet engines are originally equipped with exhaust valve rotators. Until now, the only way to make up for the rotator was to stack .300" of shims under the spring. This was not only sloppy, but they also didn't fit well. These seat spacers offered by COMP Cams will locate the spring with an outside step so the spring cannot “walk” around on the head.

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Product Details

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.

Reference Information

Valve Spring Locator, Outside Locating Shoulder, Steel, 0.300 in. Thick, 1.732 in. O.D., 0.630 in. I.D., 1.468 in. Spring O.D., Set of 100

As with all other areas in the valvetrain, the area where the spring sits also takes a beating. The old standard shims and/or seats simply will not hold up to the extreme pressures and high rpm found in today's performance engines. COMP Cams valve spring locators solve this problem and eliminate failures.