Keep your motor’s lungs fed with clean, energy-rich oxygen from the “the world’s best air filter”—K&N Air Filters. Constructed from pleated sheets of oiled cotton gauze, these air filters strip away grime without blocking airflow. Fully reusable. Million Mile Limited Warranty.
Get maximum filtration with the Airaid SynthaMax Air Filter. Featuring 5 layers of non-oiled, 100% synthetic fiber, this reusable air filter directly replaces your factory paper filter with no modifications. Washable in household detergent and reusable for life. Lifetime Warranty.
Drop in optimal engine filtration and performance with the Airaid SynthaFlow Air Filter. Replacing flimsy factory paper filters, this high-performance filter combines multiple oiled cotton gauze and synthetic fiber layers to deliver ultimate airflow and protection. Lifetime Warranty.
Not sure which 2004 Cadillac CTS 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 had heard the claims but was skeptical. I am now convinced. I put the filter in my 2007 Cadillac STS - V6. Installation was easy. It replaoes the OEM filter perfectly.
After 2 weeks of use fuel economy increased by a solid 1 mpg. The engine seems a bit stronger and throttle response is crisp. Based on the results, this filter is a real bargain. It will pay for itself in a few months of use. Highly recommended." —Edward V from Herndon, VA bought a K&N Air Filters for a 2004 Cadillac CTS.