6N5392 Manifold Fits Caterpillar 515 525 527 963 3304One New Aftermarket Replacement Exhaust Manifold Fits Caterpillar (Fits CAT) Skidder and Track Loader This aftermarket exhaust manifold replaces OEM part number 6N5392 and is designed for use on Fits Caterpillar (Fits CAT) machines powered by the 3304 diesel engine. The exhaust manifold collects combustion gases from the cylinder head and routes them out of the engine. Over time, manifolds can warp or crack, causing exhaust leaks and reduced engine