To bad this one is in Japanese, but these guy's build excellent aftermarket racing parts.
http://mines-wave.com/
It took me hours to find this one, but they have a list and photos of the aftermarket parts they build. Not to hard to navigate the site, just can't read it.
THis one is cool, you can rent Mitsubishi's WRC and Subaru's.
They include an EVO V or VI and two mechanics, and you can actually RACE IN A RALLY EVENT. CHeck this site out.
http://www.ralliart.net/rental.html
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Raceghost
Rocket powered now...
88 Jeep Cherokee Pioneer (Rebuilt).
00 Honda RC51 (...whispers of super bad!)
04 Mitsubishi Evolution VIII (Finally!)

Lead, Follow, or get the f... out the way