I was looking at pics of the Cusco Impreza and saw it's rear strut tower bar. Naturally that makes me think "of course, it's Cusco" but take a look (click to enlarge):
What is that? That's really cool how it braces to the chassis/body versus just to each other.
The page I originally got the picture off of is located here - http://www.group4.co.jp/sale2000/000114/sale3.htm
- It's got the Cusco Impreza & S15 Silvia on there.