I'm JUST coming back from getting my Injen CAI
installed - literally - and I LOVE it!!! It does come with instructions. The installation requires cutting (you'll see it in the picture in the directions) so your install place may want you to sign a waiver or something. They installed mine here in San Diego for $60 - 2.5 hours of work so I'm pleased with that price. I bought mine from this forum at the celica store. I got the blue one, just looks so cool under the Hood
, and I drive the liquid silver 2000 GT.
GREAT pick up, nice throaty sound, very sexy. I'd recommend it to anyone. Only catch is you can't be in a lot of water with it. So if it rains a lot up there and you're going through some rather deep puddles, that may be an issue. Hope that info helps!