the tip is huge! might look a little big on mp3/msp. if anything you'd definitely have to trim some of the rear skirt to fit and look good.
the muffler itself isn't Ti (only the tip is. it's riveted to the canister). it's also pretty heavy. i personally would go with the universal Ti muffler (real Ti) if you were gonna go with that big of a muffler but unfortunately HKS has discontinued this muffler so you probably could only find it at some shops that still have it in stock or maybe even ebay. i have the universal Ti on my mitsubishi (in the process of selling), i thought about transfering it over to the mp3 for boost duties but i didn't like how it would look on the car... too big for me on this somewhat smaller looking car.