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Uhem.... I wouldn't be looking at those (which are the same thing btw) if you want quiet. Mine are really deep sounding and quite loud, which I like, but the drone around 1700-2000rpms is sometimes unbearable with the top up. I'm sure it doesn't help being a thin convertible top. With it down, I don't notice it as much.....
ORIGINAL: ClayBonics
I have a long commute, looking for something maybe alittle quiter. Like Ford Racing or Borla from what I understand