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Holley Carb products have been the undisputed leader in fuel systems for over 100 years. Holley carburetors have powered every NASCAR, Sprint Cup team, and every NHRA Pro Stock champion for four decades. Holley's carb products include performance fuel pumps, fuel injection, intake manifolds, cylinder heads & engine dress-up products for street performance, race and marine applications. Shop Holley Power Valve Check Ball Kits today at Speedway Motors!