Ok First an open air intake can only HELP your car if you have a good filter on the end of it and it's less restrictive than an airbox...And not to tell you what brand to use but I tend to stay away from K&N when possible, yes you can clean them but that's because they are oil based, you use an oil based filter and it will eventually make an oil build up on your sensors that see your air before it enters the engine. But you do need to buy a quality filter. It will give you a slight HP gain depending on what brand you use (the biggest difference in intakes is the type of filter you use) but the Fujita Cold Air Intake looks great and has awesome gains...not to mention when you accelerate you'll hear it suck in.