Auto-jet Part #
NAV-0040
Navistar International Muffler
26-1/2" CASE; 7" FROM END TO CENTER OF OUTLET; 3-1/2" I.D. inlet; 4" O.D. outlet; 8-1/4 X 11-1/2" OVAL. Muffler (Referenced In Note). Fits 6" SHORTER CASE THAN NAV-0005. Inlet 3-1/ʺ I.D. inlet; Outlet 4" O.D. outlet; Case 26-1/2" CASE; Shell 8-1/4 X 11-1/2" OVAL; 26-1/2" CASE, 7" FROM END TO CENTER OF OUTLET, 4" O.D. outlet, 3-1/ʺ I.D. inlet, 8-1/4 X 11-1/2" OVAL. Transcribed verbatim, not corrected. Confirmed at 8x magnification against the PDF text layer, which shows the same "3-1/ʺ".
Model
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Outside Diameter
Overall Length
OEM Part Number
United Muffler Equivalent
Also Known As
Cross-Reference Numbers
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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.