Our 3866610 exhaust outlet connection is designed for Cummins K19, K38, K50, and QSK series engines. Precision-cast from high-temperature resistant ductile iron with a CNC-machined flat sealing surface, it ensures a perfect, leak-free seal with the exhaust manifold and turbocharger. The connection's optimized internal bore design reduces exhaust backpressure, improves exhaust gas flow, and enhances engine power output, while its robust construction provides exceptional resistance to thermal fatigue and corrosion in heavy-duty operating conditions.