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Dura-Bond Valve Spring Booster Shim
Dura-Bond's precision shims are manufactured from prime-quality cold rolled steel to lay flat and restore proper spring tension. These valve spring booster shims are available in either case-hardened or annealed series versions and meet or exceed OEM specifications. Dura-Bond valve spring booster shims are uniquely tooled to provide you with an economical high performance product.
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