Not sure on size of the exits, but it's as big as could be fitted in the spaces in the bumper.
It is a cat-back system which is 3".
I have noticed increased pull in fifth and sixth gears. Pulls far quicker from low revs.
It's well worth getting if you're thinking about it.
Sounds good (louder but not too loud), looks far better than original and gives the car quicker reponsiveness at low revs.
