Ok, it was a pain in the ass, but I installed a Volant Cold Air Intake in my Caddy this weekend. It is damn mean now when you lay into it!!!!!!!
Problems I ran into? well the intake tube they provided was way to big, bend wise, for the car without taking some of the plastic housing where the fan was. I used the original tube which worked great and is as big as the volant tube, just not as bended. Over all it took a little effort and the outcome is one mean sounding caddy without any exhaust when you are at WOT.
The Volant CAI
Caddy Before Intake
Caddy After Intake
Caddy Video - Before and After Sounds