Reviewed By Michael T (Sunnyvale, CA) Reviewed for a 2009 Mazda RX-8 —4/25/2013 10:44 AM
Every car I have ever owned has a K&N air filter in it. They are the best all around air filter and the best reusable air filter. To be honest the filter won't give you huge power gains. It will however "slightly" make the car accelerate faster, then a traditional paper filter which restricts air flow. MPG differences are slight in my RX-8 but my car wasn't really designed with Prius efficiency in mind. Older cars have been found to yield even higher positive results. Buy one, they are great!