4" or 5" straight pipe

shaggy337 · #1 (**permalink**) 10-20-2007, 06:19 PM

Hello fellow strokers. I have an 07 super duty, completely stock. Im looking into getting a straight through pipe, no cat no muffler. But i do not know which one, 4 or 5 inch. I plan on doing some other mods as well, s&b intake and cfm+ intake elbow. Later on i would like to get an upgraded trubo and injecters. I have also been looking at a programmer.

Ok after hearing me out what size do you think would be right for me? Thanks guys!

Blue01F250 · #2 (**permalink**) 10-20-2007, 06:21 PM

4" turbo back will be good enough

shaggy337 · #3 (**permalink**) 10-20-2007, 06:29 PM

You dont think i would need to worry about egts. If you dont have alot of mods done is it bad to have a 4 or 5 inch pipe? What do you think about straight pipin?

DoubleDpsd · #4 (**permalink**) 10-20-2007, 06:29 PM

4" and make sure you get an sct xcal2/3. safest and best power.

DoubleDpsd · #5 (**permalink**) 10-20-2007, 06:32 PM

Quote:

Originally Posted by shaggy337

You dont think i would need to worry about egts. If you dont have alot of mods done is it bad to have a 4 or 5 inch pipe? What do you think about straight pipin?

worry about egt's? Bigger exhaust will lower them, especially turbo back. It is NEVER bad to have a 4" turbo back exhaust and I highly suggest losing the muffler and cat cuz you'll love the way it sounds.

Blue01F250 · #6 (**permalink**) 10-20-2007, 06:32 PM

yes you need to worry about EGT's -- but thats why you get an EGT guage (along with boost, and trans temp)

the diff in EGT btwn a 4" or 5" won't be that great a difference...

and LOTS of people love the straight pipe sound!

shaggy337 · #7 (**permalink**) 10-20-2007, 06:35 PM

Thanks for the input bro, your truck is bad. That hoss is a nice lookin wheel. I want to get the chrome ones on mine.

shaggy337 · #8 (**permalink**) 10-20-2007, 06:41 PM

Ok so 4" sounds like the way to go. How much power would you have to be pushing to actually need a 5".

DoubleDpsd · #9 (**permalink**) 10-20-2007, 07:02 PM

Quote:

Originally Posted by shaggy337

Ok so 4" sounds like the way to go. How much power would you have to be pushing to actually need a 5".

more than you can afford. lol No, im not sure....a lot though!

**Diesel Freak** · #10 (**permalink**) 10-20-2007, 07:09 PM

Get that thing 4" straight piped from turbo if ya can. Then buy ya some good gauges before you add a tuner!! Post Up And Let Us In On Yer Mods

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