Auto-jet Part #
NAV-0020
Navistar International Muffler
Muffler - End Inlet - End Outlet / Same End - Reverse Flow. 32" CASE; 8-1/4 X 11-1/2" OVAL; 3-1/2" INLET; 4" OUTLET. Fits END INLET - END OUTLET SAME END - REVERSE FLOW. Inlet 3-1/2ʺ INLET; Outlet 4ʺ OUTLET; Case 32ʺ CASE; Shell 8-1/4ʺ X 11-1/2ʺ OVAL.
Model
Year Range
Material
Outside Diameter
Overall Length
OEM Part Number
United Muffler Equivalent
Also Known As
Grand Rock: 3851 | Nelson: 86755m
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Provide your OEM# when ordering.
Exhaust parts vary by bus configuration even within the same model and year.
Your OEM number is the most reliable way to confirm correct fitment.