Guys absolutely rave about the Predator, I guess its the cats meow. Over on LXforums.com.
Oh and I think that the best intake is the Airhammer, but I dont know if he's still making them. He made them for the other LX cars, dont know why one wouldnt fit the Challenger.
And the ad at the bottom of the page right now is a superchips ad, lol.