what can I say? This is a K&N filter, it is amazing and fits my Chevrolet Sonic Sedan 2013 LTZ 1.6L perfectly. The first 2 or 3 days the smell in the air was a bit strange, not in a bad way, but the smell. ok but weird. I can not describe it. But after these days, the air smells good and looks really fresh. My kids don't sneeze as much in the car as they did when I used an OEM GM air filter. I loved it!