I'm going back and forth as to whether or not i should get a SI/DO or SI/SO exhaust. What are the pros and cons to them?

And what are your opinions on the deepest sounding muffler?

 

Don't worry, I decided myself... I decided on the Flowmaster Super 44 SI/DO. Any opinions?

 

^^i have the same muffler and it sounds pretty damn good for a 6 cylinder IMO

 

Oh good. I'm hoping it'll be worth the money... I think I'm getting a fairly good deal on it afterall.

 

Its loud, drones a lot and rusts easy. I found mine to be very annoying after a while.

 

I like mine, but I think it's all personal preference. I have noticed mine is starting to rust though.

 

Exactly, every persons likes are different. If you like a loud exhaust and want people to know your coming your probably like the flowmaster. If you like something a little more mellow you'd probably like a magnaflow, borla or gibson. Its all personal preference.

 

Interesting... What does that mean?

 

it just means that when youre on the highway and mine does it at 2500rpm which is around 65mph you hear it resonated through the cab...trents right though on a long trip it can get annoying but unless youre spot on 2500 it doesnt drone that bad

 

I had mine dumped under the bed which made it much worse than if you ran pipes out the back. Some people don't mind it but noises like that just seem to drill into my head.

 

yea the farther forward you have the exhaust dump the worse its gonna be...mine dumps out the sides and it isnt too bad. it does get annoying on long trips

 

My music is loud enough that I don't notice anymore

 

^yep the ultimate solution...hear a noise you dont like turn the radio up lol

 

Exactly right! It gives you a false sense of peace.

So, is there an advantage to doing pipes straight out the back vs a pipe coming out each side? I heard from someone that if you go straight out the back, that the exhaust fumes will circulate back into the bed of the truck, and into the back glass slider. Is this true?

 

it also depends on the model from flowmaster, a 50 sereies isnt near as bad, it not as loud driving but it dosnt drone much at all

 

Yeah i had a si/so super 44 dumped right out of the muffler.....didnt like.....But now i have si/do super 44 dumped after rear axle next to spare tire. Love it.

 

What do you guys mean when you say dumped? Is that just where the tailpipes are?

 

^yes its just an easier way of sayin where the tailpipes are lol

 

well i have two 3 inch tips that turn downwards (a lot cheaper than tips out the back) or you can just cut the pipe anywhere you want after the muffler to consider it dumped.

As DJ said, its just where your pipes end, like mine are dumped (end) at spare tire carrier.

 

yea mine dump right in front of the rear bumper and the only real time i ever hear it drone is if all my windows are down...the 4.0 sounds really good with a flowmaster