BlackGMC, I ran the 12579 dumped before the axle and it was real quiet. I had stock cats, but I'd imagine over the axle out the back it would be pretty quiet without cats.

 

Yep i was looking for the biggest **** i could find, hopefully is quietens things down.

Yep, i will be getting rid of the oval muffler $15 and it is yours (you gotta come pick it up thou), but i think i am going to keep the 5" round one and put it infront of the monster i just bought .

well crap i allready bought one off ebay...

Yep i am hoping it is quiet, my truck for some retarded reason is just insanely loud...

 

im running the 5x11 22" 3.5" in/out magnaflow on my sss and its perfect, very quiet around town and at idle but still sounds mean when you get on it. also running LTs and no cats. i think youll be happy with it!

 

Im running a DI/DO flowmonster and love it. If i remember correctly its a 24" case.
Pay no attention to the dirty truck, lol.
http://www.youtube.com/watch?v=JhV2LZVfpls

 

the biggest flowmonster muffler available is the 18" case, 24" overall length muffler. the 22" case is still in the works. i had that same muffler on my truck for a while and its quite a bit louder than the magnaflow he ended up getting. it would probably be louder than his current set up as well

 

heres my thread on it, couple sound clips and ideas in it.
https://www.performancetrucks.net/fo....php?p=4484997

guess i shoulda read that u bought one already lol

 

lemme know when you get that done, i wanna hear it lol..im lookin for a quiet as hell one, close to stock would even be nice, so i wanna see how it works out for you

 

I couldnt remember how long the case was. I love this muffler, so much deeper than the 40 flows.

 

get it and get it installed already, i wanna hear this damn thing lol

 

Sorry man, it still has not been delivered yet ... Which reminds me i gotta go get gas and wire for my welder...