merek5

i just bought a 2003 lexus is300 and i was wondering what would be better a short ram or a cai, also when i browse around going through ebay and other sites i am finding many short rams but barely ne cai. does ne one know of a good site i could get one from?

Carbon~IS

Only CAI I know of is LMS
http://www.lmspower.com/product.phtml?p=6&cat_key=12

As far as which one is better...

It depends what you are going to do.
1.) Just want to get basic bolt ons and call it a day. Than get a SRT Intake w/ R-ecu and exhaust + w/e else you want.
2.) If you want to go all out N/A. Than get the LMS CAI, all the bolt ons, than AFC and get it all tuned via dyno.

Carbon~IS

2 other options i forgot....

3.) buy w/e than add a little juice til you save enough for boost.
4.) buy nothing and save all for boost.