Not sure which 2003 Nissan Altima Air Intake Systems are right for you? We have over 20796 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:
"I noticed a significant improvement in horsepower especially in 3rd and 4th gear. The installed intake looks clean and sounds great." —Mike R from El Paso, TX bought an AEM Cold Air Intake System for a 2003 Nissan Altima.