Large K&N RU-5179 Universal Clamp-On Air Filter with 9in base and substantial height for high airflow demands. Engineered for lasting performance.Specs:Large End/Base: 9 in (229 mm)Flange Inside...

Ultra-short K&N RU-5288 Universal Clamp-On Air Filter for very low clearance needs. Still delivers K&N performance and filtration quality.Specs:Large End/Base: 6 in (152 mm)Flange Inside Diameter: 3...

Extra tall K&N RU-5295 Universal Clamp-On Air Filter with 20+ inch height for maximum filter area and airflow. Perfect for specialized high-performance needs.Details:Large End/Base: 7.5 in (191...

Lightweight compact K&N RU-9410 Universal Clamp-On Air Filter. Ideal for small engines and tight installations while providing full K&N benefits.Specs:Large End/Base: 4.5 in (114 mm)Flange Inside...

K&N RU-9630 Universal Clamp-On Air Filter with narrow base and moderate height. Great for custom or smaller displacement applications.Key Specs:Large End/Base: 4.5 in (114 mm)Flange Inside Diameter:...

K&N RU-9920 Universal Clamp-On Air Filter designed specifically for Legend and Dwarf race cars with FJ1200 motors. Features offset flange and base vent for precise fitment.Specs & Notes:Large...

K&N RX-2820 Universal X-Stream Clamp-On Air Filter features an integrated pleated filter in the top for even higher airflow and longer service intervals. Excellent for racing and performance...

K&N RX-3800 Universal X-Stream Clamp-On Air Filter with angled flange and X-Stream top for maximum airflow. Adds pleated media in the top for enhanced performance.Specs:Flange Angle: 20 degreesLarge...

Very short K&N RX-4130-1 Universal X-Stream Clamp-On Air Filter with X-Stream top technology for high performance in limited space.Specs:Large End: 6.813 in (173 mm)Flange Inside Diameter: 3.813 in...

K&N RX-4140 Universal X-Stream Clamp-On Air Filter in round straight design with integrated top filter for superior airflow and filtration.Key Specs:Outside Diameter: 4 in (102 mm)Flange Inside...

K&N RX-4730 Universal X-Stream Clamp-On Air Filter combines tapered design with X-Stream top for exceptional airflow and extended service life.Specs:Large End/Base: 6 in (152 mm)Flange Inside...

Extra duty version K&N RX-4730XD Universal X-Stream Clamp-On Air Filter with reinforced construction and X-Stream top for demanding use.Specs:Large End/Base: 6 in (152 mm)Flange Inside Diameter: 3 in...