08 YZ450F Quiet pipe shootout?

Haven't been able to find any 2008 YZ450F .....have I missed a quiet pipe shootout somewhere? I'm thinking of buying a Q4 but sure would like to see some objective data

well I dont now anything about a shootout but I have a 06 WR450 with a full leo vince system and it is quieter than stock by quite a bit. I also have a good friend with a 08 yz450 with a full leo vince and it is louder than mine but still very quite.

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