Quiet Stacks???

[jvmoore]

I have been considering adding a set of 5 inch miter cut stack to my 3rd gen 3500. I love the look of the stacks however I like the fact that I can pull up to a drive through and not have to turn the truck off. Has anyone found a combination that give a semi stock sound? I know many feel that louder is better but I don't want to listen to a loud drone pulling a 37 foot trailer 1000 miles.

 

[Forrest Nearing]

with a quad, you can have quiet stacks...



I'm pretty sure you can squeeze a 51" donaldson under a quad cab... if that's not enough (which it should be) you can get some auger bit inserts (that's not what they're called, but that's what they look like... ) actually, just buy one and cut it in half...



it'll probably quieter than stock w/ the 51" and the stack inserts!

 

[nick05]

if you still have the Kat on you might be able to move the stock muffler towards it. i don't know for sure. i have some 5" stacks straight and kept the Kat on for now but it might come off in the summer. if your state doesn't do emissions i would cut the Kat and put the 51" nelson on or a muffler of preference. i wouldn't put the stocker back on even though that saves money. aftermaket will lower egt's and give a little better tone possibly.

 

[JMingledorff]

I've ridden in trucks with mitre cut and turn back stacks and inside the cab the turnbacks seemed quieter. If you had the stacks higher above the cab than a couple of inches that might make a difference.



I'll be doing stacks on my new truck but am going to do turnbacks since the mitres I had on a past truck blew black crap all over the place on start up after a rain since the rain just fell straight down in them. I like the mitre look better but they sure were messy.

 

[Forrest Nearing]

there was no difference in interior noise between my miters and turnbacks (both loud as all getout)



but w/ the windows down, the miters were FAR noisier!!!

 

[keimmmo]

I have seen big truck mufflers with the outlet on the SIDE. Shouldn't be too hard to slip in the muffler in place of the 90* elbow turning up to the bed.



Steve Keim

 

[Glen Pratt]

Dynaflex Monster Stacks can be ordered with an optional internal muffler in the spool piece section. Here's the link: http://www.dynaflexproducts.com/jstacks.html . Not cheap. Also Berubes carries these slip-in mufflers for stacks: http://www.berubes.com/p32.html

 

[Forrest Nearing]

those insert mufflers at berubes are the ones I was talking about when is said auger bit inserts... they're 72" long, so just buy one and cut it in half