questions for those of you running a 5" exhaust

[Sonic_Superduty]

I just got my 5" put on from the DP back, it sounds awesome with the 03 wistle and all... But I deffinantly noticed my low-end went out the door on me?? I realize that the VGT needs some back-pressure to respond well so I am assuming that is why it went away?? now I am running a 4" dp with dj`s tuning im on street smoke right now , and have always like it....

what can I do to get rid of this problem??? go back to 4", or get a fuel system??

will the fuel system clean up the low end and get me back to where I was??

 

[reg-cab]

i would say put a fuel system on it will give you some more power