Cummins ISB/QSB 3957199 EGR Cooler PAI 141443CROSS REFERENCE: 3957199 3958027 APPLICATION: Cummins ISB QSB BRAND: PAI 141443 Cummins 3957199 EGR cooler PAI 141443 ensures stable exhaust cooling under load. Heavy duty engine parts plus diesel parts maintain performance in demanding trucks. This unit helps prevent overheating and extends service life in tough duty. All components are proudly manufactured in the U. S. A. by PAI Industries Inc., an ISO9001 certified company with over 50 years of