OP, sound is all subjective so you will get some people with sensitive ears and some that are deaf. What I can tell you is that with the stock cats the rasp will be minimal. If you ever want to swap your cats I would go with Motordyne Art pipes. They do extremely well at controlling rasp, but you will get some drone on the highway (as with any straight pipe). I currently run Motordyne Art Pipes, AAM Midpipe and AAM resonated short tails and the sound is amazing.
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2015 370z Nismo l AAM Resonated Short Tails l AAM Mid-Pipe l Motordyne ART Test Pipe l BC/DR Coils w/Swift Springs l Forgestar l SPL
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