Found a part # [NEL86544M] 4'' in & out with a 10'' body. Is it straight through & how long is it ? Seen someone running a 40'' with the cat. This is what I want to try. Stock motor so I think the 51'' 5'' in & out would be a waste. Thoughts please.

 

The part # for the 40" is 86127M. It is a smaller diameter. Either 7 or8"(I forget! ) It sounds basically the same with the cat, as the 51" without. Perhaps a shade louder when you really step on it, but otherwise the same. Hope this helps!

 

Well thanks, BUT I can't find a match for 86127M on the Ryder page.

 

I bought it at Cummins Alberta. They brought it in on their Fleetguard order. If you have a Cummins dealer near you, you can order it there.

 

That number is "up to date", as I just had it installed last month.

 

The Donaldson M085171 is also a 40" straight thru 4" muffler with a 8.5 inch diameter. Ryder has it for 58.60 special order. Mine was delivered in less than a week.

 

You show a 51" in your gallery, did you change it to a 40"?
If so, how come?

 

The 51" was on the 03, which did not have a cat. The 40" is on the 05. which does have a cat.

 

Which do you like better TT?

 

Turboted did the hangers come with the muffler or did you make your own?

 

They sound about the same, because the 05 has the cat. The 40" is a bit louder under heavy acceleration, but not an unbearable drone type sound. I had it installed at a muffler shop, and they weld the hangers on.