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Isky Cams Valve Spring Shim Kit 0.010 0.015 0.020 0.030" Thick 1.250" OD Steel 10475 Induction Hardened Sprockets WEI7155 Induction Hardened Sprockets Cool your jets These are just a few of the many ways Isky's research is shared with the racing enthusiasts Still another dynamometer is used exclusively for the purpose of testing the endurance of racing valve gear components in today's OHV engines