If you have a 99-00 Cougar then you won't need a hanger...If you have an 01-02 Cougar then you will...The easiest thing to do is take a peek under your car & see for yourself. Either way it's no big deal...If you DO need a hanger, it's a five-minute operation at any competent muffler shop and a fairly inexpensive modification. As for fitment, Borla is held in extremely high regard (and expensive as all hell), so I seriously doubt you'll encounter any issues with poor fitment. If you need specific information, I would suggest contacting Edgecat, as he actually owned the Borla kit.
~PREZ CIII