I've got a Vortech YSI for a fox body. Don't know what it would take to fit it on a 99 Cobra, but I've heard that Vortech will take old brackets in on trade for new brackets....
The head unit is brand new, never been mounted. The brackets, piping, blowoff valve etc is used. I have both the regular pulley setup and the cog setup with it. I'm asking $3500 for it but I'd consider any reasonable offer. I can get pictures tomorrow if you'd like to see them.