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GSC5011 GSC 124lbs Ovate Conical Valve Spring & Ti Retainers Ford Mustang GT 11-17 5.0L Coyote Gen 1 & 2 2JZ-GTE Twin Turbo Supertech 41mm +1 0mm UndercutGSC5011 GSC 124lbs Ovate Conical Valve Spring & Ti Retainers Ford Mustang GT 11 17 5. 0L Coyote Gen 1 & 2