The Outerwears Pre Filter, manufacturer part number 20-1137-01 and vendor part number 20-1137-01, provides an added layer of protection for compatible air intake systems. Designed to help shield the primary air filter from sand, dirt, clay, water, and other unwanted elements, this pre-filter supports reliable intake performance in demanding riding and operating environments. Confirm fitment against your air filter, intake assembly, and vehicle or equipment model before installation.
Made with silicone-impregnated micro-mesh, the Outerwears pre-filter is water resistant and built for repeated use. Its uniform micron-sized openings allow air to enter while filtering particles as small as 0.005 inches in diameter. Dyno and flow bench testing has shown no significant loss of horsepower or air intake performance when this product is used correctly, helping maintain airflow while adding valuable protection to the underlying filter element.
Seams are dielectrically welded to create a durable, secure construction suited to off-road, powersports, and other applications exposed to dust and moisture. The compact filter cover design is intended for compatible intake filters and should be installed according to the application requirements. The Outerwears Pre Filter is a practical choice for extending service intervals and reducing contamination reaching the main air filter.
Features:
- Brand: Outerwears
- Model: Pre Filter
- Manufacturer Part Number: 20-1137-01
- Vendor Part Number: 20-1137-01
- Fitment: Designed for compatible air intake filters and intake assemblies; verify application-specific fitment before purchase
- Airflow: Dyno and flow bench testing showed no significant horsepower or air intake loss when properly installed
- Material: Silicone-impregnated micro-mesh with water-resistant properties
- Filtration: Filters particles as small as 0.005 inches in diameter without noticeable airflow restriction
- Protection: Helps block sand, dirt, clay, water, and other unwanted contaminants
- Construction: Dielectrically welded seams provide secure, durable assembly