This K&N air cleaner assembly is great for racers or anyone looking to boost their engine's performance. It can be used with any engine that uses a round element air cleaner housing. The assembly measures 5.125in in ID, 14in in OD, 2.75in in height, and has a 1.25in drop base. Each set comes with a base, an element, and a top plate, making it easy to install and start enjoying improved air flow right away.