Bill Johnson's coach is a 2003 & it has a Cat in it--#653
Exhaust out the roof is a first I've seen on a Newell
Steve, you are correct. I took the owners word for it without verifying. I do show that Bill's coach (653) has a C-12 in it also. I will modify my original post.
Good catch Andrew!! I didn't notice the large engine roof exhaust at the rear. I don't recall seeing that on any other Newell either.