I just put on 4in turbo back MBRP on my 07 5.9L and its only loud when I stand on it idle is nice but not loud enough. I have a auto so running around 1500RPM then hammer it ohhh sounds sooo good! I just went to FL the other day and went through mobile they have a big tunnel there and you wouldnt belive all the noise I could make in there sounds good to go
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2007 Dodge 2500 quad cab 4x4 5.9L diesel B&W turn over ball, MBRP 4" exhaust turbo back, EDGE juice with attitude, icebox, Silencer is MIA