An Air Intake should be the first performance modification on your mind when you are looking to upgrade your car. When looking at almost any purpose built race car, or any serious tuner out there, one of the first things you'll notice in the engine bay is an Air Intake. The reason this is, is because Air Intakes provide your car with the air it needs to breathe efficiently.
Performance - Adding an Air Intake to your Honda S2000 will add about 5-8hp. Although the number seems small, those additional horsepower will make a difference on your track times as well as a noticeable difference when you get that heavy foot so many of us have, and want to use at times. To recap, whether it's running down the track, or passing people by on the freeway, adding an air intake to your car will definitely give you that noticeable increase in power so many people are looking for. Also, because you're allowing your engine to breathe a lot easier, you're stressing the motor less, which leads to better gas efficiency because you don't have to push your car as much. This gain in gas efficiency, will allow for you to be on the road more, enjoying that new intake you put on.
Sound - When you install an Air Intake, whether it be for performance, or just because the OEM filtration system is ,or was, going out, you will gain a noticeable sound that brings joy to your ears. As soon as you use your heavy foot to go Wide Open Throttle, you'll notice a loud vacuum sound coming from your engine bay. That is your new Air Intake letting you know that your motor can finally breathe and is getting the air it so desperately needed but wasn't getting because of your restrictive stock system.