Powr-Flo Throttle Body Spacers by Jet Performance are designed to improve engine performance and efficiency by increasing the velocity of the air flowing into the intake manifold. The improved air velocity creates an improved air charge and allows more air to enter the combustion changer. This results in improved throttle response and in many cases increased fuel efficiency. Jet Throttle Body Spacers install fast and easily (usually within 20 minutes) with basic hand tools. Jet Throttle Body Spacers are precision machined from billet aluminum by Jet's in-house CNC machine shop right here in the USA. The part number for this item is 62105 and it fits 1991-1995 Chevy / GMC Pickup and Suburban (7.4 Models) models.