Okay so I have been looking at cold air intake kits for my car. The 3 Ive been looking at are K&N, Thrasher, and aem. Thrasher is the only one I can see that makes one specifically for my car. Can anyone suggest which one im guessing K&N is the best but I would like one that is easy to install.

How concerned are you for the price? I noticed the Thrasher kit is $225. You could save some money by going for a FWI (Fender well intake) and have a cleaner look at the same time.

Is the instalation very difficult and do I have to use their filters?

PM YounggunLS1. He custom makes CAI for our cars. He made mine and I'm very happy with the results.

On a FWI you can use any cone filter that is the same diameter as the tubing you are using. Installation involves popping off the driver'* side headlight and sliding everything in place. The headlight is really easy to take off though so no worries there.

How about an Intense Racing intake? The suggested ones are great, and here'* another option:
Intense Racing Fenderwell Intake Kit for 98-05 Cars