Running no muffler

[06 Strocker]

So i was thinking about just removing the muffler leaving the cat on. Will this help my truck at all or does the turbo need back pressure? Some guys say your mpg will go down but its probably them just laying in to the truck for the sound so what do you guys think?

[PSDBuilder]

The turbo supply's back pressure on a diesels the faster u can get it out the better

[SelahPSD]

I've heard that too--that running a straight pipe will reduce MPGs. Can anyone verify if that's true and why?

[06 Strocker]

I heard it was that theres no back pressure

[bwmtnbiker]

That is all false, a straight pipe on a turbo is a good thing. The turbo itself provides all the back pressure the motor needs. A straight pipe will not hurt mpgs, if anything it should help some because the turbo can move air more efficiently.

My RAZR made me send this...

[cartmanea]

The muffler isn't that restrictive compared to the cat, so all you're going to gain is some upset neighbors.

[DEVERO2]

Originally Posted by bwmtnbiker

That is all false, a straight pipe on a turbo is a good thing. The turbo itself provides all the back pressure the motor needs. A straight pipe will not hurt mpgs, if anything it should help some because the turbo can move air more efficiently.

My RAZR made me send this...

This is the conclusion that I came to. I dont know if my mpg's got better when I swapped the exhaust since I was also on a new motor.

[crspeedy67]

When i put my 4in turbo back magnaflow system on W/O cat but have muffler which is strait thru I gained better than a 1 mpg.

[onebadcoastie]

Ask yourself this;

1. What are my mpg's currently?
2. If they dropped 1-2 mpg's, would I lose sleep at night?
3. What if I did gain mpg's?

Just try it. If you don't like the performance or the sound, put it back on. Just my

[scparrish]

no mpg loss and just removing the muffler won't be real loud at all my favorite sounding exhaust is muffler and cat delete on factory exhaust you still have a resonator pre cat