Does anyone here have quantifiable exhaust noise data? I would like a list to compare stock to slip-ons and full exhausts. So far I have only found noise levels from BOS exhaust. Per BOS, at 5000 RPM, stock is rated at 100 dBA and was measured to be 96.5 dBA. BOS claims their slip-on brings the noise level back up to 100dBA. I know Yoshi is usually quiet but have no data as of yet. I really want more noise without a header but am worried that a slip-on is just paying $600 for looks. So what data is out there?