Well, comparing how my car sounds relative to one with the same exhaust + Cold air intake, I can tell you CAI is going to give a noticeable increase in overall "growl" and a little more deepness, so Stillen G3s will be my next mod, then a tune finally.
The car I've been comparing to mine also has intake manifold as well, so I'm guess that is probably also subtly affecting growl/deepness, but I can't say from experience.
Cat-replacements of any sort will definitely increase the volume alot over CBE by itself. But if you want a deeper sound, I highly recommend the Motordyne ART pipes. My AAM setup already had a deep sound, but the resonated test pipes made it ever deeper and amplified the growl. But your neighbors might hate you when you start the car in the mornings, lol
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AAM Resonated Short Tails | AAM S-Line Midpipe | Motordyne ART Pipes | Stillen G3 Intakes
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