HI!

Does anybody know the changing intervals of the air filter?

I want a sport exhaust with a really good sound. But which one should I buy?

David

 

Do you have a stock filter or are you using something like a K&N? You should get something like the AEM Cold Air Intake.

 

change the air filter when it gets dirty, take the lid off your air box and have a look, if it looks black and filthy change it. If you have 25,000 miles on your car and have never changed it, then go buy one and change it.
OR
like Java said, go out and buy a Cold Air Intake, your car will appreciate it.

 

you should clean it every 5k or 10k i believe

 

check it every oil change, or if you drive in dusty terrain, check it more often.

 

The stock filters cant be cleaned only replaced. If you are going to spend the money on a K&N filter you may as well go ahead like Java said and get the AEM CAI. The filter alown is about $20-$30 and the whole CAI is about $170. Not to mention if you are getting an exhaust that will help you output then getting this to help your input would make even more of a difference!