Not sure which 2003 Infiniti I35 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:
"Since I have owned my new drop in K&N air filter I get better gas mileage and notice less restriction and more power when I accelerate. I love it" —Randall M from San Antonio, TX bought a K&N Air Filters for a 2003 Infiniti I35, 3.5L V6.