I have the 5db eliminator kit with my Flowmaster Delta flow 40s and I love them!!!
Here is a sound clip of my setup with my flowmaster 40s before and after the blastin bobs installed....
Before with 40s and OEM resonators....
https://www.youtube.com/watch?v=TavqikXukHw
After with 40s and 5db Blastin Bob eliminator kit....
https://www.youtube.com/watch?v=SWx6QsUPEUc
I was told by Bob that if I went with the 10 db kit or higher with my 40s on, that it would feel like im sitting in a big massage chair. The 44s are louder than the 40s so it would probably vibrate worse. Not to mention if you have passengers, they might not like it much because of the drone. With my 5db and 40s setup, I only get drone while cruising at 85mph and its not bad at all.
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As I lay rubber down the street, I pray for traction I can keep, but if I spin and begin to slide, please dear god protect my ride. Amen.