This cold-air intake can be purchased from any North American Nissan dealership. We like it because it creates a wicked sound and provides a noticeable increase in throttle response across the entire rpm range. Easy to install, this intake makes for a great weekend modification. We spent about 2 hours installing it in our driveway, and had no problems or issues to speak of. Nissan claims this kit adds up to 12 hp on all Titan and Armada applications.