i dunno bout the 3.0.. but i had straight pipes on my 4.8 and it was way to raspy for me, the loudness was good and loud and i licked that, but the rasp was way to much for my taste.. almost as if i was driving some old muscle car with no cats and no mufflers.. so i went to the xpipe option and it still is louder then stock, but nothin obnoxious,

but hey who knows u have a 3.0 that prolly does not produce a lot of sound so maybe going wit straight pipes might be perfect

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