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I'm also curious. I'd love to have a valved exhaust that can pass Laguna Seca sound (<90dB measured ft. away) at full throttle uphill when in quiet mode, but also be decently loud and fun with valves fully opened. My current exhaust system (muffler swap only) just barely passes sound, but sometimes I'd like to be quieter on long drives.
It seems like all the systems out there are still quite loud in their "quiet" modes.
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