4" or 5"

[smokin6.6]

wondering if i should go with the 5" straight pipe of the 4" straight pipe. let me know what you guys think

[Meyerperformance]

4" is more than enough to cover what you prob will be doing. But 5" has deeper exhaust note, and offer more flow and lower egt's. I run 5" and love it but if you dont wanna spend extra money 4" more than enough.

Tyler

[1LoudDuramax]

5 inch turbo back straight-you wont regret it but your neighbors might!!!

[catman_05]

How would 5 inch turbo back on a lb7 sound, Also can you put on a bigger down pipe or is the 3.5 thats stock all you can do. I mean someone told me that you can only tap onto the factory down pipe

[psyco66]

Diamond eye makes I beleave a 3 1/2 down pipe. If you want a stainless exhaust you have to get 4 inch. I do not think anyone is making a 5 inch stainless yet. I have had my truck next to a strait piped 5 inch exhaust and there is not much of a differance between the two sounds.

[catman_05]

What does it have on ti stock

[psyco66]

I am not sure.
Diamond Eye Performance, LLC

[Meyerperformance]

Mganaflow has a 5" ss exhaust, all there exhuast are 400 series ss

[1LoudDuramax]

Originally Posted by catman_05

How would 5 inch turbo back on a lb7 sound, Also can you put on a bigger down pipe or is the 3.5 thats stock all you can do. I mean someone told me that you can only tap onto the factory down pipe

Well in shoert it sounds like a jet engine taking off but not near as annoying as a straight piped Cummins

[curnow17]

The local truck shop I go to told me that if you don’t have a chip and programmer that it is a waste of money for the 5 inch and that it will cause the truck not to run to it's full potential. Does any one have a 5 inch without a programmer ?