Will a “S” muffler fit on a non S 986

[Escott1622]

I’m getting a 2001 Boxster non S model and I’m going to be sending an muffler to fister to get it modified. I live in PA and they work out of CA. My plan was just to buy a muffler in California from a dismantler and just have it sent down the street to fister to get modded, can I use a “S” model muffler or does it have to be the same non S muffler. If I can use a S muffler what years would I be able to use. I don’t want to have 600$ spent on a S muffler that won’t fit or won’t work correctly (I heard pipe sizes were different which may lead to power decrease)