How loud is it?

 

Straight or muffled?

I have a 4" downpipe that immediately turns into 5" at the trans. It's an Expandit system with their muffler. The droan is awful at around 2300 RPMs. I haven't decided if I want to do a Donaldson or drop down to 4".

 

What is a donaldson? Just wondering because i have that same 5" expandit without a muffler and it has a bad drone at 2200-2300. Its getting annoying with all the trips down interstate going 80.

 

It's a muffler. Many, many big trucks run them as factory equipment. They typically flow just as good, and better in some cases, then most aftermarket mufflers. You and I would probably want the M90535 from what I can tell.

Not my truck but a good sound clip-





Donaldson Company - Exhaust + Emission



https://www.dieselbombers.com/5-9l-c...5-muffler.html

 

they do have alittle diffrent sound to them

 

straight

 

mine is 5 from turbo back and its not bad at all better than the stacks and cleaner

 

have 5 inch magnaflow turbo back and going down hiway or in town its not loud at all. if i get on it then it has a nice little roar. if anything i would want it louder. no drone at all

 

mbrp 5'' straight

 

I have the expandit 4 inch down to five inch straight wouldn't change a thing. I don't think it's too bad in the cab Maybe it's my flat bed but I don't mind it at all I love the noise when I open my passenger side window. How do I make it louder.