K&N High Flow Air Filter
1019-0818 (MFG #: DU-9001)
$145.99
Sale price
$145.99
Regular price
$145.99
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K&N High Flow Air Filter for Polaris Trail Boss 325 ATV
K&N
K&N High Flow Air Filter for Polaris Trail Boss 325 ATV
K&N
$145.99
Sale price
$145.99
Regular price
$145.99
SKU:1019-0818
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Description
K&N Powersports High-Flow Air Filter
Upgrade your machine’s performance with a K&N High-Flow Powersports Air Filter. Designed to increase airflow while providing superior filtration, these premium reusable filters help your engine breathe better for improved horsepower, throttle response, and overall performance.
Built with oiled cotton gauze media, K&N filters capture dirt and debris while allowing more air to reach the engine compared to traditional paper filters. The result is better performance and long-term reliability for motorcycles, ATVs, UTVs, and other powersports machines.
Unlike disposable filters, K&N air filters are washable and reusable, helping reduce maintenance costs over time. With proper cleaning and oiling, one filter can last for the life of your vehicle.
Key Features
High-flow design improves airflow and engine performance
Superior filtration protects your engine from dirt and debris
Washable and reusable for long-term value
Durable oiled cotton gauze construction
Direct OEM replacement for easy installation
Designed specifically for motorcycles, ATVs, UTVs, and other powersports applications
Why Choose K&N?
K&N is a global leader in high-performance filtration, trusted by riders and racers worldwide. Their powersports air filters are engineered to deliver maximum airflow without sacrificing engine protection, helping you get the most out of your ride.
Technical Specifications
- MFG. Part Number DU-9001
Vehicle Information
Polaris Trail Boss 325 ATV (1999-2002)
The Polaris Trail Boss 325, produced from 1999 to 2002, is a robust ATV known for its consistent performance. This model features a reliable 325cc (or 324cc in some documentation) 4-stroke, single-cylinder engine. It is air-cooled and includes a fan-assisted oil cooler, delivering approximately 19 horsepower. Throughout its production run from 1999 to 2002, the Trail Boss 325 maintained these core specifications, offering a dependable ride for various off-road conditions.
There were no significant mid-cycle generation or engine changes reported for the Polaris Trail Boss 325 within the 1999 to 2002 timeframe. The 325cc model was the primary designation, and no distinct sub-trims were offered during these years. The engine type remained a 4-cycle, single-cylinder, air-cooled unit with a fan-assisted oil cooler throughout. Q: How do I ensure I select the correct parts for my Trail Boss 325?
A: To guarantee a perfect fit, please use our year and model selector at the top of the page. This will filter parts specifically for your 1999-2002 Polaris Trail Boss 325.
Maintenance
| Component | Interval | Details |
| Engine Oil and Oil Filter | 25 hours or 1 month (initial break-in); 50 hours or 6 months, or 800 km or 6 months (routine) | Change the oil filter with every oil change. |
| Air Filter | Inspect daily or weekly; Clean/Replace as needed (some suggest 50 hours or 6 months) | Inspect more frequently in dusty or muddy conditions. |
| Drive Belt | As needed | Inspect and adjust or replace as needed. |
| Spark Plug | As needed | Gap of 0.9 mm. Type BKR6E. |
| Coolant | Level check daily; Strength and leak check annually; Replacement every two years |
Maintenance intervals may vary. Always consult your vehicle's official owner's manual for the most accurate information.