i'm looking to drop a intake into my accord...
which has the most HP avalible for my car?

and is there a diffrence between complete air intake and cold air intake?

 

i would go with aem,injen or k&n. those make pretty good intakes.

 

cold air intake is compleate intake. There are other options such as short (not good as it will suck hot air) and ram air intakes (best as it will use your vehicles momentum to force air inside of your engine..)
Highly recommand K&N ,,, you can actualy feel the difference and hear it too
good luck

 

cold air is the best out of the two options readily available (CAI or SRI) but it has it's own set of problems

1. you can hydrolock the engine if you go through water that is deep enough
2. changing the air filter is a big P.I.T.B.