Description This is a replacement air filter for CTS-IT-250, CTS-IT-290R, CTS-IT-300R, CTS-IT-305 andCTS-IT-340/CTS-IT-340R. Product Details 6′′ velocity stack with 3.5′′ outlet High quality molded silicon base and cap Stainless steel clamp High-flow reusable air filter Fitment CTS-IT-300R CTS-IT-305 CTS-IT-250 CTS-IT-290R CTS-IT-340 CTS-IT-340R.