[Raypro]

I got the Borla 2.5" Flex back system for my '05 Sedan and the sound is awesome. You can do a search on youtube for "Borla Focus" to hear it on cars. It's a Ford Racing Product so call around some Ford dealers that deal in the Ford racing products and they may have some left. It's discontinued so there isn't many left out there. I remember there was a few dealers up here that still had it but I ordered mine from a dealer in MN since it was much cheaper.

MBRP would of been my 2nd choice, it has a nice sound as well but the Borla has a nice 'throaty" sound.