Not sure which 1999 Hyundai Sonata Air Filters - Custom Fit is right for you? We have over 14143 customer reviews, with an average rating of 4.5, to help you find exactly what you're looking for. Here's what some of our customers have said:
"Have noticed an increase in highway gas mileage and in overall performance. Able to maintain highway speed at a lower RPM." —Gary T from Islip, NY bought a K&N Air Filters for a 1999 Hyundai Sonata.