Just installed a Nelson 5x 51 inch ,straight in and out, reduced to 4 inch ,mine had a baffle in the middle,was really torn wether to open it up,decided for now to leave it.Really pleased with the sound,had a magnaflow and a flowmaster before that.The truck seems to take off from a dead stop now with no bog.Your local cummins dealer carries them,sorry don,t mean to steal your thread.

 

I had the Donaldson M090535 installed today...

The noise Don is referring to is really noticeable at idle. I hope it softens some once the muffler is sooted up a bit

Overall, though, it *is* nice and deep, without getting loud. Even at WOT.

 

do the donaldsons only come in a 5" in/5" out? I want to stick with my 4" and dont want the adapters.

 

No, the M090544 is 4" in/out. I just had mine installed last week.

 

was it a straight through muffler or did you have to break the baffles?
I want a straight through.

does it sound the same as the 5"? I liked how Dons sounded

 

Mine has baffles and I did not open them up. I dont know about the sound, I do not have speakers on my computer. Mine is barely louder then stock. You can look up the one you want on this site.

https://dynamic.donaldson.com/webc/W...?section=10210

 

are you going to try and remove the baffle or are you going to keep it or get rid of it?

 

I am leaving the baffle, I was going to punch it out but decided to just leave it.

I wanted a little louder muffler, but will drive this awhile and see how I like it. I added a 5" tip yesterday and that made the sound deeper. But I tow alot and make long trips, so did not want to chance it being to loud or getting drone.

I am going to put all new 4" exhaust pipe in the next 2 yrs, if I decide then to go a little louder I will put the 40" donaldson in.

And I did not remove the cat.

 

oh ok. I thought you had the cat removed.

thx

 

I just dumped my Aero Turbine 4040 and installed the Donaldson 90535. A lot quieter and doesn't sound like a Honda coffee fart can when you get on it. NO Drone on the freeway at 70 mph and 2000 RPMs. Just Awesome, I love it