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Ecotec Valve Spring Shim set

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  • Ecotec Valve Spring Shim set


    SKU: 20004 Category:


    These Shims our used in our Stage 1 engine to bring the stock spring seat pressure. These shims bring springs up 10 lbs and still out of coil bind. They allow safe operation to 7500 rpm for a fraction of the price of aftermarket valve springs.

    About the author: Mike Wallace