using bullets vs flowmasters

Here is a comparison chart that VOETOM posted not to long ago. You can compare various mufflers with X-pipe and without. The last numbers show the loudness at different RPMS.

Sorry bullets wasn't listed.

I have Flo 40s but after seeing this chart I am sold on the Dynomax "Welded" Ultra flows. More flow with less noise compared to the flow 40s.