straight piped 6.0

[99jeep06stroker]

I have a MBRP 4" turbo back exhaust, and i was wondering if i take the muffler off and straight pipe it will the mileage drop alot?

[PSV8TD]

My fuel mileage dropped maybe 1 mpg when I went from stock to MBRP 4inch cat back straight pipe.

[99jeep06stroker]

Thanks man, anybody have different mileage change with turbo back?

[weasel79]

I think I might have gained 1mpg but I didnt lose any. And it is a true straight system.

[darsey715]

[ QUOTE ]
I have a MBRP 4" turbo back exhaust, and i was wondering if i take the muffler off and straight pipe it will the mileage drop alot?

[/ QUOTE ]
you might lose a couple mpg's cuz you'll be getting on it so often at every stop light.

[Smokewagun]

So, I have an MBRP cat-back on my 2007 6.0L. I want more whistle and more notice. The MBRP sounds good, but no whine and nobody really cares to hear it. I debated about the delete pipe for the muffler. Now, I want it. The problem is that I will destroy the exhaust piping as I will have to cut the muffler out because the clamps kink the pipe and muffler inlets/outlets in order to tighten them up enough to keep the system from working loose. So, what is the best way to go about removing the muffler? In addition, because I have to cut out the muffler, the inlet pipe and tailpipe will now be too short to accept the delete pipe - or the section cut out with the muffler will be too large to just insert the delete pipe. Where can I get some more 4 inch pipe with a flared end? The MBRP muffler is flared on the inlet and outlet, so after I cut it out, I will need some more "parts". Have any of you just turned the exhaust out just past the kitty? Will it destroy my rear wheels with soot? Thanks,

Smoke.

[darsey715]

[ QUOTE ]
So, I have an MBRP cat-back on my 2007 6.0L. I want more whistle and more notice. The MBRP sounds good, but no whine and nobody really cares to hear it. I debated about the delete pipe for the muffler. Now, I want it. The problem is that I will destroy the exhaust piping as I will have to cut the muffler out because the clamps kink the pipe and muffler inlets/outlets in order to tighten them up enough to keep the system from working loose. So, what is the best way to go about removing the muffler? In addition, because I have to cut out the muffler, the inlet pipe and tailpipe will now be too short to accept the delete pipe - or the section cut out with the muffler will be too large to just insert the delete pipe. Where can I get some more 4 inch pipe with a flared end? The MBRP muffler is flared on the inlet and outlet, so after I cut it out, I will need some more "parts". Have any of you just turned the exhaust out just past the kitty? Will it destroy my rear wheels with soot? Thanks,

Smoke.

[/ QUOTE ]
if you want more whistle you're gonna need a 4" dp assuming you leave the cat in. I would suggest cutting your 5 or 6 inch tip off, then welding it right after the cat pointed down or out to the side. simply deleting the muffler isn't gonna do too much. you have a few options with exhaust.