DUKCALN

I am wanting to try the straight pipe again. I had my tow twins straight piped and really didn't like the sound. I added the aero before I went with the R-700 twins. Its not loud at all right now, quiet at idle and at WOT its mild. I am wondering if the R-700 will be meaner than the tow twins straight piped. I want my truck to sound like a 650hp truck. Will a 5 inch exhaust be louder, if I stay with a muffler which one will sound meaner than the aero. What do you guys think, suggestions please

2007 5.9

DUK, I suggest you step up to a 5" exhaust....MBRP makes a cheap 5" TB and if its too loud with the supplied muff, then you can to the Donaldson 51" like I have. Very mellow under most situations, and mean sounding under WOT.

JOESHTRDDSL

I will be at the next dyno day. You can listen to my truck, I have 5" straight pipe. Yours will be a little quieter with the twins, but mine is pretty darn loud.

DUKCALN

Joe, good to see you can make it. When i had the special my exhaust was loud. I had the BD muffler at the time. I think I will step up to the 5 inch. Is it 4 into 5 after the down pipe? Les, your did sound pretty darn wicked. 5 inch with the supplied muffler huh? What about 5 inch straight piped? If i go 5inch straight piped it will be on soon, my buddy has a shop. Will I go from the down pipe back with the 5 inch.

rip 112

FloPro Twister. Still loud enough, but not raspy. I love mine.

D45

I have a full 5" straight pipe, no muffler or cat, and love the sound.

DUKCALN

Looks like I am going 5" straight piped with a 6" tip........ Thanks for the replies.

JOESHTRDDSL

My exhaust comes out of the turbo 4" but instantly turns to 5" within the first couple inches off the turbo outlet. Joe