2.25" vs. 2.5" X-Pipe?

[Helihover]

I was quoted 175 for a resonator delete. No X pipe and he told me that he would cut the flanges off. I take it these $40-$60 x pipes (which I still can't find) don't come with flanges. I would love to find an x pipe with flanges so I could do the install and be able to take it back out.

Can someone please post a link to these $40-$60 x pipes.

Edit: I searched again and found a bunch non specific to BMW. So looks like the flanges must go unless you have one custom made with flanges which doesn't sound like a bad idea. The muffle shop wouldn't have to touch the X or know what it's for. Might be able to save a few bucks if you told them it was going on a 1982 chevy truck