4995186 exhaust outlet connection gasket is built for Cummins 6B5.9, B4.5, D4.5, ISF, QSF, F2.8, F3.8, F4.5 and QSX15 engines. This high temperature resistant sealing piece blocks exhaust gas escape at outlet joints. It prevents power drop and black exhaust leakage caused by loose connections. Easy positioning during exhaust system reassembly for repair workshops.