The Bendix Remanufactured BA921 Series Single Cylinder / Single Stage Air Compressor is the perfect choice for Caterpillar applications. This compressor is built to provide reliable and consistent performance in demanding conditions, and is designed to withstand the rigors of heavy duty use. The inlet position is top and the outlet position is side, making it easy to install and use. FleetPride is your First Click in Heavy Duty®.