I think you kind of answered your own challenge there.... It is nearly impossible to make an aggressive sounding exhaust with no drone or rasp. The fact is, the things that kill drone and rasp (smaller pipes and aggressive resonators) also kill the aggressive sound. I don't want to say it is completely impossible, and if someone can do it it would be Motordyne, but that is asking a lot.
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2009 G37S Sedan-6MT: Advan / Volk / Tein / SPC / Invidia / Cobb / K&N
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