ok I have the tymar air intake TS 6 position tuner 3" down pipe now I want new exhaust not stacks looking for a deep tone any suggestions on size

 

5in will be deeper then 4in but it doesn't do anything other sound

 

Bob-
I am reading this and trying to process what it says.

I understand that 5 inch exhaust would have a deeper sound than 4 inch exhaust...

"but it doesn't do anything other sound"
Are you saying that there is no other benefit going from 4" exhaust to 5" exhaust other than sound? (Thinking there are 6" pipe kits out there also...) I do understand that the turbo turbine outlet (at least on the TP-38) is only 3"...

Mine? Dual 3 inch exhaust through mufflers. Mine seems very "quite" compared to most, but I still seem to have plenty of flow without any noticeable back pressure at all. Although, flow and area wise, I'm not sure where I sit compared to a 5" pipe. I think I have more flow than a single 4" but less than a single 6" pipe. So, I'm not sure where I compare to a 5"... And I was wondering if I should go to a 5 " or not. Not sure of any benefits that I would gain there... so your comment really caught my attention. (Personal interest peeked...)

 

4in is going to flow all your ever going to need. So going to a 5in kit isnt going to do anything for you performance wise. At that point all your doing is going for looks and sound

 

Then-- I guess since with my dual 3 incher's, I have 2 sq/in's area over what I would have had with a single 4" tube, going to a 5" tube would be a waste of money for me.

I had thought that with it being only 3" at the turbo compressor outlet, that here would be a "only opened up to" after that to "big as" limit somewhere... Good to know. Thanks.

 

I was told that 4'' was for truck under 450hp and 5" was for truck over. But i agree. Unless your building a high performance rig its probaly just what you think looks better.

 

I have over 500+ and you dont need 5". Maybe when you get into the super pullers like double overtime or when the turbo outlet is 5" but not in a regular pickup

 

I thought you could go over 450 with a 4" but thats just what i was told. Good to know from someone who has 500+.

 

When I get everything back up and running I should be 600+. I have no worry about 4" being enough

 

3" downpipe 4" straight pipe beyond that.