Thanks Cajun. Ive been reading this thread. Interesting stuff. Im tempted to get a cheaper unit, and then put a good filter on in. Heat shield...looks like minimal gains. Im hoping to maybe pull another 1mpg or so.
That's a good question and there's more than a few on here who have made their own but here's a good thread to check out: http://www.ramforumz.com/showthread....&highlight=cai. If you do a search for "DIY CAI", you will turn up a few different ideas, more links than I can post here but, IMO, as long as you have a good filter and everything is connected properly, you can make one for a lot less money.