1633103 Manifold-E Fits Caterpillar ModelsOne New Aftermarket Replacement End Exhaust Manifold for Caterpillar (Cat) Equipment This aftermarket replacement exhaust manifold (end section) fits Caterpillar equipment powered by the 3412, 3412C, and 3412E engine family. The end exhaust manifold collects and directs exhaust gases from the last cylinder bank to the exhaust system, and is a critical component for maintaining proper exhaust flow and engine efficiency. Over time, exhaust manifolds can