Bassani Headers + cats + Y-pipe

Hi everyone!
Does someone have experience with Bassani headers + cats & Y-Pipe? They are apparently well known for Ford, but how is it with a 4th gen F-Body?
I own a 98 convertible Trans Am (OK I'm a stranger here, sorry): will the pipes interfer with the stock crossbrace? The SLP headers needs a special crossbrace, what about the other products?

Thanks - Stefano