COMP Cams calibrated test springs are designed to handle springs up to 2 in. diameter and 4 1/2 in. free length, so its useful for more than just checking valve springs. The 0-1000 lb. range by 5 lb. increment scale allows you to check open pressure as well as seat pressure. Test COMP Cams Rimac and mini valve spring tester units so that they can be recalibrated in the field. They are made from high-strength steel for accuracy.

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