My msp has a muffler delete that the prior owner did, i think it still has the stock mid resonator and cats, actually doesn't sound half bad but its a bit too loud for my taste and kinda droney on the freeway. Racing Beat still makes a full cat-back exhaust but I think it needs a little bit of modifying for the msp, HKS still makes exhausts, there's probably more options but I think most have been discontinued. U might get lucky on ebay for example there's a
https://www.ebay.com (commissions earned) up right now