Im just getting into cars, i just got a 2001 zx3 ford focus. poeple are talking about CAI what is that? and whats the first thing you should do when doing interor and exterior mods? sorry im a newbie but i need help on this stuff.
You can use an AEM CAI, just use an AEM bypass valve with it. This will keep water out of your engine in hard rain or should the air filter become submerged. I have an AEM CAI on my ZTS and it's great. You won't be dissapointed with the performance you get with an AEM CAI.