Not sure which 1991 Nissan NX 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:
"I have k&ns on my motorcycle,so I knew they would be great I was very impressed with about a 10 hp. gain, which is great for a 130 hp. car." —Scott M from Glen Ellen, CA bought a K&N Air Filters for a 1991 Nissan NX, 2.0L 4-cyl. engine.