I belive it does. The pipe is bigger than the stock midpipe, but the flange is the same. I'm just going from memory on this, I don't have a ScoobySport, but I do have a Stromung, and I belive they are similar in that respect, being a direct replacement for the stock can. I don't have any numbers, though, sorry.
I just got done with a group buy from Rally Performance. They have two mufflers, one for the WRX which has a 2.5 inch diameter, that won't fit on our cars cause our midpipes are like 2.25 and one of the mounting brackets doesn't work with ours. The other is just like the WRX except there is an area about 3 inches from the connector that is specially fabricated by scoobysport so it will fit up to our midpipes, and the mounting brackets line up. I love the exhaust.