Manufactured from high quality machine finished aluminum, Spectres ThrottleBody Spacers are engineered to improve engine performance. By providing addedvolume to the intake manifold and directing air through a tapered internalconstriction, this spacer utilizes the Venturi effect to increase the speed ofair flowing into your intake manifold. Spectre has designed a number of kitsto fit a wide range of specific applications. Each kit includes the necessarygaskets and hardware to bolt directly to the factory components, makinginstallation quick and easy.