Purely based on what is visible, it's not Intamin. Though they do make a variation of their typical hollow box/triangle shaped track connected by diagonal bars, those variations usually have more prominently rounded spines and a much different look. Not to mention Intamin would be much less reliable for an indoor compact themed coaster considering the closest they have to a themed coaster is California Screamin (outdoors and large)...Thi13teen is also primarily outdoors and takes up a large footprint. Considering Premier's track record (pun intended hehe), I'm going to go with them.