The Outerwears ATV Pre-Filter is designed for use with K&N HA-4504 air filters and provides an added layer of protection for off-road engines. Manufactured from silicone-impregnated micro-mesh, this water-resistant cover helps reduce the amount of sand, dirt, clay, and other unwanted elements reaching the primary air filter while maintaining efficient airflow.
Dyno and flow bench testing has shown no significant horsepower loss or reduction in air intake when using this pre-filter. Its uniform micron-sized openings filter particles as small as .005 inch in diameter without noticeable airflow restriction, helping support dependable engine performance during demanding riding conditions. Dielectrically welded seams provide a secure, durable construction for off-road use.
This Outerwears pre-filter fits 2004 and 2005 Honda TRX450R ATVs equipped with the compatible K&N HA-4504 air filter. It is identified by manufacturer part number 20-2077-01 and vendor part number 25-5837. Verify the air-filter model and vehicle application before installation to ensure proper fitment.
Features:
- Fitment: Fits 2004 and 2005 Honda TRX450R ATVs with a compatible K&N HA-4504 air filter
- Brand: Outerwears
- Manufacturer Part Number: 20-2077-01
- Vendor Part Number: 25-5837
- Material: Silicone-impregnated micro-mesh with water-resistant properties
- Filtration: Filters particles as small as .005 inch in diameter
- Airflow: Designed to provide filtration without noticeable airflow restriction or significant horsepower loss
- Construction: Dielectrically welded seams for durable off-road use
Fitment:
2004 Honda TRX450R
2005 Honda TRX450R