Been deciding whether to install a short ram, or a cold air intake. I know that the short ram is much more safe in wet conditions, and the cold air isn't so much. Another thing is temperature. The short ram can get extreme in temperature, same for the cold air, but not as much

 

I haven't came across a Cold air intake for an is300, I don't think anyone manufactures one but I could be wrong.. I have an aem short ram on mine..
If you're worried about temps, a couple brands also come with a heat shield with a kit... K&n is one of them

 

Neither... there will be no power gain under normal driving conditions...

 

most you can gain from a cai is like 5-8 hp and maybe 3-4 with a shorty. you are better off building your own kit for way less $$ and can route it any way you want. The only difference my Sc has from its CAI is the sound, it is much more throatier.

 

always go sri with injen personal opinion I seen great improvements also dyno result prove slight increase in throttle reponse