Image 1. 1995 Thomas 54 passenger, International 3800 T444E, 195 HP.

Image 2. Stock OEM Muffler configuration on International 3800 Bus. (Style 2 muffler - 3.5" inlet / 4" outlet).

Image 3. View showing stock OE muffler, brackets, & frame brackets.

Image 4. Close-up showing frame bracket - this will stay in-place & be re-used.

Image 5. Removal of OEM muffler brackets.

Image 6. Disconnect 4" tail pipe from mid-pipe.

Image 7. OE Muffler removed (looking toward front of bus).

Image 8. Frame brackets ready to accept new Grand Rock hangers - part # QPM-8H. (Old rivits drilled-out, & holes enlarged).

Image 9. New QPM-8H hangers in place - attached to OEM frame brackets. (New rubber straps are included with the new hangers).

Image 10. Sliding the Grand Rock QPM-851-354 into place.

Image 11. Tightening the new muffler bands.

Image 12. New 4" midpipe after muffler, new pipe hanger - attached to tail pipe.

Image 13. New muffler & 4" midpipe all bolted in place - installation complete in less than 1.5 hours. New muffler sits higher-up under chassis & creates more ground clearance. A better fit than the OEM muffler, & quieter.

Image 14. The new fuel-saving muffler is quiet, smooth, & it is quieter inside the bus. The QPM series mufflers are constructed of heavier aluminized steel than OE or other stock aftermarket replacement mufflers, giving them a longer lifespan. Minimum of 3% fuel mileage improvement is GUARANTEED by Grand Rock, & this is very conservative. Most reports show over 12% improvement.