it looks really lame...something that honda people get.
a muffler ain't gonna do jackshit if the rest of the exhaust is tremendously restricted.
go to a shop and get a full exhaust made, incorporating the cat and o2 sensors of coarse.
i only got my muffler for aesthetic reasons.
if you want one that works then take a look at this:
it is somewhat pricey but it's all function over form.
the design behind the twin loop muffler is to create two mufflers in the space of just one. My muffler is straight-though and it isn't loud at all. this is where the TL muffler becomes a big expensive shiney restrictive piece of unnecessary metal. it impedes functionality.
of coarse it is just an opinion...you'd have to wait until you get your response from someone foolish enough to get this on their car.