Chevrolet Performance windage trays reduce aeration of the oil from windage, permit rapid oil return, and protect from oil splash-back-resulting in more horsepower and improved oil control for your performance engine. This product is for LS-based engines with a rear sump. Used in F-body applications or where an F-body style oil pan will be used. Reduces aeration of the oil from windage, permits rapid oil return, and protects from oil splash-back in your engine.