What kind of brace is this?

[BeatJunky]

Whats its purpose & where does it go?
http://cgi.ebay.com/ebaymotors/ws/eBayISAPI.dll?ViewItem&item=2414696238&category=33591

[Dousan_PG]

http://www.jspec.com/nismos14bar.html

Nismo power bar 2-- front lower bar
up the chasis in the front of the car.

[BeatJunky]

Thanks!