So if any one is interested, I put a dB application on my phone and took some "scientific" measurements last night. Standing next to my bike with my arms as far apart as possible (6ft span), my left hand holding the phone, and my right hand on the throttle, 98 dB at 5000 RPM was measured. Sound spiked to 101 dB with a quick rev to 5k. If I put the phone right at the muffler, the highest dB was 103 on a quick rev to 5000 RPM. More proof that slip ons which max around 100 dB will do nothing for sound on this bike.