Where does your exhaust exit. Under the car?
An "H" pipe will help.
It seems to me for the most part,Flomasters are not really quiet mufflers.
If you want a really quiet muffler,some sort of Hemi long type muffler. Not sure of the brands.
Just remember ,the longer the muffler,usually will be the quiter muffler.

MBHD


12 port SDS EFI