The center mufflers on an LX car are about as big as a suitcase hence the nickname, it's actually 2 mufflers in 1 case, the way it's designed you would have to mount it under the trunk floor, it wouldn't fit in a car with a solid axle in the normal location.

The rear resonators are kinda form fitted to the floor and wrap up around the side of the car a bit.

The center muffler is 2.25" in and out the resonators are 2.25 in with tips welded on the rear.

If it were me I'd use a long case dynomax turbo, it should fit fine and be quiet.