I looked at those along with the Smartpartz Hard Kore baffles...
http://www.smartpartz.com/...I went with the Hard Kore since they were a lot cheaper and they accomplished my 2 goals.
Maintain performance while
reducing the sound level... Once I installed them I could not believe the exhaust note was very similar just quieter...my bike also runs great on these, no noticeable decrease in performance, they may even help the low end response with the increase in back pressure...not sure...
They are worth a look if your Daisy Cutters have factory baffles...Talk to Chris he will get you a set to fit even if they are not listed on the web site...Oh, they also offer a 30 day money back guarantee...