New Genuine PAI O-Ring P/N 121422. (Qty. x1 as pictured.)

Alternative and other replacement reference part numbers:  Cummins 3683814; Caterpillar 6L7817.

Application: Various applications including Cummins ISX EGR Cooler.

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*PAI p/n 121422 is #2 in the above diagram(ISX).  Other parts sold separately, please contact us for a quote.

Please Contact us with the Truck Serial Number and the Engine Serial Number if you have any doubt this is the correct part, or please contact your local OEM dealership for correct part number to ensure correct part.

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We're an authorized dealer of PAI and Excel products, please let us know if there is any other parts you might need, thanks.