If you can afford it, definitely go the resonator (hotdog)route, I've got a Jap system on my car, don't know what brand but it has the Jasma plate on it, it has two resonator's and when cruising you can't even hear it. Still has a nice note when you get into it though.

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F.B. Racing
01 WRX (STI badged)
2010 XR5 Focus
06 Impreza Hatch 2.0i