K&N Universal X-Stream Clamp-On Round Air Filter 3.531in Flg ID/4in OD/5.969in H - RX-4140

K&N XStream Top Universal Air Filters take performance to the next level with the addition of a filter within the filter's top adding more filter area for higher air flow and a longer service...

K&N X-Stream Top Assembly 14in OD 5.125in Neck Flange 3.063in H - 66-3040

Not only does the K&N XStream add filter area, it actually redirects airflow inside the filter to pull in more air through the side pleats for even greater performance efficiency. Cleanable and...

K&N X-Stream Top Assembly 14in OD 5.125in Neck Flange 4.62in H w/Vent - 66-3010

Not only does the K&N XStream add filter area, it actually redirects airflow inside the filter to pull in more air through the side pleats for even greater performance efficiency. Cleanable and...

K&N X-Stream Top Assembly 5.125in Flange ID / 14inx3.75in H / 1.25in Drop B - 66-3060

Not only does the K&N XStream add filter area, it actually redirects airflow inside the filter to pull in more air through the side pleats for even greater performance efficiency. Cleanable and...

K&N X-Stream Top Filter Only 11in - Black - 66-1101

K&N XStream Air Flow Tops replace the top of your existing round filter and add a new dimension to engine breathing by feeding your engine all the air it can use. They are washable and reusable just...

K&N X-Stream Top Filter Red 11in / 5.125in Neck Flange / 3.5in Height - 66-3110

Not only does the K&N XStream add filter area, it actually redirects airflow inside the filter to pull in more air through the side pleats for even greater performance efficiency. Cleanable and...

K&N X-Stream Top Filter X-Stream 14 inch OD Black - 66-1401

K&N XStream Air Flow Tops replace the top of your existing round filter and add a new dimension to engine breathing by feeding your engine all the air it can use. They are washable and reusable just...

K&N X-Stream Top Filter X-Stream 14 inch OD Chrome - 66-1401XP

K&N XStream Air Flow Tops replace the top of your existing round filter and add a new dimension to engine breathing by feeding your engine all the air it can use. They are washable and reusable just...