Spectre 86-95 GM 4.3L/5.0L/5.7L Throttle Body Injection SpacerManufactured from high quality machine finished aluminum, Spectre's Throttle Body Spacers are engineered to improve engine performance. By providing added volume to the intake manifold and directing air through a tapered internal constriction, this spacer utilizes the Venturi effect to increase the speed of air flowing into your intake manifold. Spectre has designed a number of kits to fit a wide range of specific applications. Each kit includes the