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Isky has color-coded their rocker arms for quick identification. The purple anodizing on these roller-tipped offset rocker arms tells us they are 1.6:1 ratio--the limit for Chevys in the Challenge.
Traditional Evolution

 Isky has color-coded their rocker arms for quick identification. The purple anodizing on these roller-tipped offset rocker arms tells us they are 1.6:1 ratio--the limit for Chevys in the Challenge.  View Related Article

 

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