Forum Discussion
John___Angela
Apr 16, 2018Explorer
The new ones are quieter though. I had to drive a friends 2008 Tiffin Allegro Bus the other day. It has.8.9 425 Cummins and it was considerably quieter than our 2003 Cummins ISC 350. I’m not mechanically inclined but my guess is probably a combination of exhaust system and injectors. Meh. After 15 years with my Cummins I’m used to her rumble. :). If I want quiet I’ll drive our electric cars. :).
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