dr.d quiet insert

anybody here use the quiet core insert for their dr. d exhaust. if so how does it help with the sound levels and how does it affect power. thanks for the help

It drops the sound a ton, I didnt measure it, but it is very noticeable. The power reduction was very little if any. I didnt hillclimb with the quiet core, and thats the only place I would be able to tell. So for trial riding and such I noticed no power loss. Good product IMO.

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