The Unorthodox kit is actually the RPS (Revolutions Motorsport) kit. Unorthodox is considering buying the rights from them... kinda like a Jackson Racing/Moss Motors type thing in reverse.
Anyway, Revolutions has a kit on a prelude now. They've been testing it since last year. I spoke with the owner of the test car via email this morning. The unofficial word is that it could be on sale in two to three months. At this point, they're still troubleshooting the kit though.
The main difference now is that the throttle body has been relocated so it is no-longer a "blow-through" design. I don't know about you guys, but this thing looks more cluttered than the JRSC. http://www.djcc.com/SCPrelude/engine1.jpg
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