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I just bought the Yoshimura TRC slip on exhaust for the CBR250R (see pic below). Before I ordered it I e-mailed Yoshimura wanting some Db specs and thought I would share my finding with anyone else thinking about this pipe. Here is what I emailed and their response:
Me:"I was interested in the 2011 Honda CBR250r TRCStainless/Stainless Slip-On and I was wondering what the decibel levelof the pipe is. Also, is their a silencer that will work with this pipe?I want it mostly for performance and looks but I don't wanna beobnoxiously loud."
Response from Yoshimura: "According to MIC test standards: OEM- 76.1 dBA, Yoshi w/o Insert- 96.8dBA, Yoshi w/ Insert- 88.5 dBA. According to AMA test standards: OEM-88.3 dBA, Yoshi w/o Insert- 102.0 dBA, Yoshi w/ Insert- 99.6 dBA.A low volume insert is included with the slip-on (part number TRC-INS-K). No other insert is available for this specific application."

Me:"I was interested in the 2011 Honda CBR250r TRCStainless/Stainless Slip-On and I was wondering what the decibel levelof the pipe is. Also, is their a silencer that will work with this pipe?I want it mostly for performance and looks but I don't wanna beobnoxiously loud."
Response from Yoshimura: "According to MIC test standards: OEM- 76.1 dBA, Yoshi w/o Insert- 96.8dBA, Yoshi w/ Insert- 88.5 dBA. According to AMA test standards: OEM-88.3 dBA, Yoshi w/o Insert- 102.0 dBA, Yoshi w/ Insert- 99.6 dBA.A low volume insert is included with the slip-on (part number TRC-INS-K). No other insert is available for this specific application."
