I have a 4" straight with no resonator and no muffler. I like it that way . Slight drone at full RPM with WOT.

 

i agree i like loud exhausts and i always find myself turning the radio down to hear the turbo. i have mine staright piped from the stock 3'' to a 4" turnout right in front of the r/r wheel. its crazy loud! my dad however has a QC dually and the muffler fell off so he installed a piece of 4" pipe in place of the muffler. he left the resonator on and the exhaust still came out the tailpipe. it was still loud but didn't drone at all. now he took the tailpipe off and replaced the 4'' piece of pipe with a heavy duty truck muffler from Fleet Pride that elbows down right off the outlet. for a muffler its got a great tone and you get a great turbo sound through it. he has a six speed in his and it sounds great shifting gears.

 

I find myself turnin my radio off as well to hear that turbo sing. I have a buddy of mine who did pretty much the same thing youre old man did. It sounds pretty darn good. He has a five speed tho. When he shifts and activates his clutch his wastegate screams. I love my truck but i can def see myself gettingva six speed somewhere down the road. I miss shiftin gears. Take care bud