4" exhaust a must?

[pete1968]

I already have the stock 3 1/2" stainless system. Can I get enough flow by just doing a muffler delete? Not turning her into a dragster or anything. Am planning on installing a wildman chip and I already have K&N CAI installed. Any suggestions backed by scientific data or personal use are greatly appreciated! Thanks!

Check me out on fuelly.com (5thgear) .

[kinnisoj]

What are you hoping to get out of your truck?

[pete1968]

Just a daily driver. Light towing and 18mpg if possible... 01 F350 DRW 4X4...

[kinnisoj]

The stock exhaust on any of these trucks are just fine if thats all your lookin at doing. A straight through system would help the truck out and let her breath but its not a must. I was truely suprised how quiet my truck is after putiing a 5" straight turbo back system on. Id like to say I could feel a diffrence in the truck but not reeley.

[rufushusky]

Originally Posted by pete1968

I already have the stock 3 1/2" stainless system. Can I get enough flow by just doing a muffler delete? Not turning her into a dragster or anything. Am planning on installing a wildman chip and I already have K&N CAI installed. Any suggestions backed by scientific data or personal use are greatly appreciated! Thanks!

Check me out on fuelly.com (5thgear) .

Nothing scientific here but IMHO no if you aren't going to substantially increase fuel flow then no you don't "need" a 4" exhaust. Personally I am planning on an in/out 3.5" muffler (like the walker muffler) and calling it a day.

[Wannabitawerm]

3 1/2 should be fine. Delete the muffler and enjoy the sound. Mine had a 4" turbo back and I deleted the muffler. Love it.


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[Omnomnom]

Ditch the K&N, dont filter good enough for turbos. I have 4in Straight turbo back. Sounds pretty good IMO

[Im_Strokin_ur_Cummins]

You will be fine with the stock pipe and deleting the muffler and CAT. 4in really doesnt increase the flow much in comparison any thing bigger then that is just for pure sound unless you are pushing high horsepower

[pete1968]

Thanks for the posts! I took most of the advice but kept the K & N intake! Did a muffler delete and new polished stainless double walled tapered BAD AZZ tip! sounds freakin sweet!!!! and the mpg have went up according to the computer by 3 already!

[pete1968]

tip is a 3 1/2 inlet to 6 inch. Cant wait to get the Wildman chip in tomorrow along with new clear headlights!