This AEM 4-inch Short Neck 5-inch Element Filter is perfect for car enthusiasts who want to improve their vehicle's air intake system. It can be used in various driving conditions, whether you're on a daily commute or hitting the track. The filter is designed to be washable and reusable, providing long - term cost savings. With its 4 - inch short neck and 5 - inch element, it fits many standard vehicle air intake setups.