https://youtu.be/5CbDzoRsGEk
Just a short video that starts with the engine at 5500 dropping to 4800 and then idle. My phone sound meter read a peak of 108db.
Full Version: Ben's quiet muffler at 5500rpm
Nice. I'm at least a year away from being able to use mine that is on standby for my conversion. I'll be more than happy! Thanks for posting. 
This is a "lo-fi" version of our main content. To view the full version with more information, formatting and images, please click here.