Yes I am running Dual 3inch on the 4.8L
and these Imco are similar to the flows, but I have noticed less resonance in the cab at cruising speeds

I like them..
they have a better sound than the flows, and a bit less cab resonance..
I got both of the mufflers for 120bucks

 

Good deal, any chance you'll strap it on a dyno for the improvement those cats make to the wheels? I've heard 10rwhp but am a little leary of that, I just eliminated mine.

 

as a matter of fact I am probably going in Jan...
but the last time i went to the Dyno was over 2 years agao, and I was running 14.7's and I had 2.5" pipe...and shorties..
only thing that will be diffrent will be the
Tune
a 3500 stalled TC
Long Tubes
3 Inch pipe
and diffrent mufflers

dynoed right near 300 to the wheels last time, and now I am running low 13's, so I am hoping for 300+ this time

 

Well good luck man

 

i have those same cats , you cant hardly tell i even have them with the cutouts opened.