Gumout Fuel System Treatment, 4 pk./6 oz.Product Features: Gumout Fuel System Treatment is formulated with powerful cleaning agents that remove carbon deposits and gunk from intake valves, fuel injectors, and combustion chambers, restoring optimal fuel flow and improving overall vehicle performance with every use. Helps reduce hesitation, rough idling, and hard starts by targeting buildup that can restrict airflow and fuel delivery, ensuring your engine runs smoother and more efficiently in