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mon-thurs 9-5 cst
The "Red Stripe" spring is the strongest 10.8 lb spring on the market and rightfully named Heavy Duty. The Heavy Duty clone spring will allow the engine builder to custom fit their spring kits. Having been through a specific process, which will reduce the amount of spring pressure loss from running in the engine, this spring will allow the engine to run a higher RPM before experiencing uncontrolled valve float. This spring will not test legally without being set. Springs should be checked before installation to ensure they meet rule requirements.