QSC, QSB6.7 Aftercooler O-Ring Kit – PART #5312664

Genuine Cummins Aftercooler O-Ring Kit for QSC8.3 & QSB6.7 Engines. Kit Includes (5) O-Rings. Works on 3 and 4 O-ring style Aftercoolers. If servicing a QSC engine please add the QSCMountKit (Link or checkbox) for all the necessary o-rings required to reinstall the QSC aftercooler.