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K&N Race Specific XStream Air Flow Air Cleaner Lid Built For On-Road Racing Use

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K&N XStream Air Flow Top filter 66-1400R is made with fewer layers of cotton

K&N XStream Air Flow Top filter 66-1400R is made with fewer layers of cotton to provide even more airflow and less restriction than a standard XStream Air Flow Top

K&N XStream Air Flow Tops replace the lid of existing round carburetor air filter assemblies thereby adding additional air filter surface as well as increased airflow. The additional filtration area redirects airflow inside the air cleaner allowing the carburetor and engine to pull in more air for even greater performance. K&N XStream Air Flow Top, number 66-1400R, takes this concept one step further for racing use. XStream Air Flow Top 66-1400R is made with fewer layers of cotton to provide even more airflow and less restriction than a standard XStream Air Flow Top.

This XStream Air Flow Top filter lid has a 14 inch outside diameter featuring a durable black powder coated ring

This XStream Air Flow Top filter lid has a 14 inch outside diameter featuring a durable black powder coated ring with K&N logos embossed around the rim

As a result, XStream Air Flow Top 66-1400R is intended for racing use on paved surfaces only. This race-only X-Stream air flow top is ideal for road courses, oval tracks, or the drag strip where only minimal engine protection with almost unrestricted airflow is sought after. Race-only XStream air flow top, 66-1400R, is cleanable and reusable using standard K&N air filter service products. It can be run oiled, or dry, for racing on paved surfaces only.

XStream Air Flow Top filter 66-1400R delivers acceptable protection for racing engines, and will work with a wide range of applications. This XStream Air Flow Top filter lid has a 14 inch outside diameter featuring a durable black powder coated ring with K&N logos embossed around the rim. For additional XStream Air Flow Top filter options, including versions better suited for street or off-road use, see the K&N XStream® Air Flow Assemblies, Filters, and Filter Tops page.

Find K&N performance products for specific vehicles using the K&N application search then use the K&N dealer search to find a K&N dealer in almost any part of the world.


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K&N Engineering in Riverside California is the world's leading manufacturer of washable performance air filters and air intake systems. K&N invented the reusable high flow cotton air filter in 1969 and has been perfecting the technology ever since. K&N is a world class filtration company selling air filters, oil filters, and intakes in over 30 countries. K&N sells over 5,000 products designed for cars, trucks, motorcycles, engines, and industrial applications. From their Million Mile Warranty to their Consumer Protection Pledge, K&N stands behind their products and their consumers 100%. The distinctive K&N logo represents performance from one of the original performance companies. For more information, visit knfilters.com.