Many Moroso valve covers are manufactured in the tall style. Taller covers may not fit some engine compartments. Power brake boosters and air conditioning boxes may interfere in some applications. Check hood clearance before ordering. Moroso stock height valve covers are recommended in cases where hood clearance and/or accessory clearance is a problem. However, any Moroso valve cover described as "Stock Height" or with "Built-In Baffles" will not clear stud girdles or shaft rocker assemblies.