5" Turbo back?

[bc11]

I purchased what I believed to be a true 5" turbo back exhaust and it came with a 3.5" down pipe.

My question is will a 5" down pipe fit? Why would this manufacture call it a
5" turbo back if it's not?

I am new to this site and new to digging into this '05 6.0.
Thank you all for your help and comments!

[ThirdCoastStroker]

i have always found it odd that they call it a 5" turbo back when it is really a 3.5"dp to 5" exhaust, mine on the 6.4 is that same way they all are, and i highly doubt you would ever squeeze a 5" dp in there with out literally cutting out the firewall

[bc11]

Thanks for your response. I will install it this weekend.

[T.R.P.]

Sorry man, no one can fit a 5" down pipe on our trucks. The 3.5" BARELY fits.

[travisH3]

I have a true 4" straight pipe. The 4" down pipe is huge. When I was installing it i swear it did not fit but after 2 hours screwing with it I got it. The 3.5 fits much better and supposedly u lose low end power with a bigger down pipe

[bc11]

Thank all of you for your response. I took about two hrs and changeed out the exhaust and rotated the tires sunday. I have lost bottem end however, that was expected at this point.
thanks guys!