OUTERWEARS ATV Pre-Filter for K&N KA-4508, Part Number 20-2371-01

The OUTERWEARS ATV Pre-Filter is designed for use with K&N KA-4508 air filters on select Kawasaki KFX 450R models. Manufacturer part number 20-2371-01 and vendor part number 25-5854 identify this silicone-impregnated micro-mesh cover, which adds an extra layer of protection against common off-road contaminants while supporting dependable air intake performance.

Dyno and flow bench testing has shown no significant horsepower or air intake loss when using this pre-filter. Its water-resistant material helps protect the underlying air filter from sand, dirt, clay, and moisture encountered during trail riding, racing, and other demanding ATV applications. Uniform micron-sized openings allow air to pass through while filtering particles as small as 0.005 inches in diameter without noticeable airflow restriction.

The OUTERWEARS pre-filter features dielectrically welded seams for consistent construction and lasting durability. It fits 2008, 2009, 2010, 2011, 2013, and 2014 Kawasaki KFX 450R models equipped with the compatible K&N KA-4508 air filter. Verify the existing air filter model and vehicle application before installation.

Features:

• Performance: Dyno and flow bench testing has shown no significant horsepower or air intake loss while using the pre-filter.
• Water Resistance: Silicone-impregnated micro-mesh material helps resist water intrusion.
• Construction: Dielectrically welded seams provide durable, consistent assembly.
• Filtration: Uniform micron-sized openings filter sand, dirt, clay, and other unwanted elements while allowing air to enter.
• Fine Particle Protection: Filters particles as small as 0.005 inches in diameter without noticeable airflow restriction.
• Fitment: Fits 2008, 2009, 2010, 2011, 2013, and 2014 Kawasaki KFX 450R models with a K&N KA-4508 air filter.