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354 Posts
Discussion Starter · #1 ·
Should I go with the 4in downpipe and dpf delete or should I go 5in all the way? I have an 08 and the only other mods I plan on are an edge and maybe a cold air intake. Any info would be great.
 

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Diesel Junkie
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4,683 Posts
4" is plenty..even with a moderately moded truck.
 

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319 Posts
That is all opinion really. I have seen threads back and forth about the 4 or 5 and my .02, do what makes you happy or more important the pocket book if ya know what I mean.
 

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1,157 Posts
5" = lower EGTs and quieter

If you look a few pages back you'll probably see a few threads about it.
 

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Washington Chapter Vice President
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5,055 Posts
I have the 4" and i am happy with it. I never see really high EGTs and it sounds fine. I imagine that the 5" has a different sound (throatier) but according to my pocket book the 4" is sufficient.
 

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Where's my sparkplugs????
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1,046 Posts
4inch is plenty and with the right muffler plenty quiet. I'd say the 5inch is more for looks than anything unless you pushing tons of power..
 
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