New CUMMINS ISM EGR Cooler that includes all the necessary o-rings and gaskets. Inlet Inside Diameter: 1.4" Fits Freightliner and International for years 2002, 2003, 2004, 2005, and 2006 and Peterbilt 2003, 2004, 2005, and 2006. No core charge. Helps to cool exhaust gas and re-circulate it back into the engine. Replacing the EGR prevents coolant from leaking into the exhaust manifold. It's unqiue straight tube design helps reduce premature clogging. Made of high quality stainless steel. Essential replacement for reducting emissions and passing State Inspection. If you need assistance please don't hesitate to call us 888-643-0678.