9S2578 Manifold Fits Caterpillar Fits CAT Loader 950 955K 955LOne New Aftermarket Replacement Exhaust Manifold Fits Caterpillar (Fits CAT) Wheel Loaders This aftermarket replacement exhaust manifold is a direct replacement for the Fits Caterpillar (Fits CAT) OEM part number 9S2578. The exhaust manifold collects spent gases from the engine cylinders and routes them into the exhaust system, and is a critical component for maintaining proper engine performance and emissions control on Fits CAT wheel loader