The RSX-S doesnt have this?

 

This is only offered in the Type-R in Japan. But parts can be ordered to put this set together; on a complete set including even the nuts adn bolts and etc. there should be like 10 pieces. But you can cheap out and order the main parts only. However, if you are running a cold air intake like the AEM or DC Sports one, there is not enough room for this. Sometimes, you can not have the best of both worlds!

 

It's probably not worth getting unless you plan to track your car.

They do fit with the AEM CAI but not the DC Sports CAI.