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The K&N E-3690 is a washable high-flow replacement air filter designed for Polaris Sportsman ATV models including 500 H.O., 700, 800 EFI and MV700 from 2002 to 2007. Its layered oiled cotton media allows more air into the engine for added horsepower while trapping dirt and contaminants. This direct drop-in filter installs into the factory airbox with no modifications and cleans easily for repeated use.
Key Features
- Factory Airbox Fit: Precision shape with 9-1/4in ID, 11in OD and 6in height matches OEM dimensions for simple installation.
- Increased Horsepower: Engineered design pulls in more air to deliver noticeable power gains on Polaris Sportsman ATVs.
- Yes, it is a direct OEM replacement for 2005-2007 Sportsman 500 H.O. models with 9-1/4in inlet.
- Four layers of oiled cotton gauze pleated for high capacity and dirt-holding ability.
- Re-oil filter with 1.62 oz of K&N air filter oil after washing for peak performance.
- Over 50 years of air intake engineering for powersports vehicles.
Fitment
| Fitment Status | Universal or dimensional product |
|---|---|
| Required Verification | Exact dimensions, media, connection, mounting interface, and companion part number |
Specifications
| Brand | K&N Engineering |
|---|---|
| Manufacturer Part Number | E-3690 |
| Product Type | Air Filters - Drop In |
| Fitment Type | Universal |
| Condition | New |
What's Included
One new K&N air filters - drop in identified by manufacturer part number E-3690. Hardware, adapters, clamps, hoses, filters, and service supplies are included only when stated for this exact product.
About K&N Engineering
K&N develops reusable air filtration, intake, oil filtration, fuel filtration, and related performance products for vehicle-specific and dimensional applications.
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Frequently Asked Questions
How do I confirm K&N E-3690 fits my setup?
Match every listed dimension, flange or thread size, media type, mounting interface, and companion component. A similar shape or outside dimension alone does not confirm compatibility.
Is K&N E-3690 washable and reusable?
Serviceability depends on the exact media used for this part number. Follow the K&N cleaning and oiling directions for this filter and never apply oil to media specified as dry.
What should be checked after installing K&N E-3690?
Verify seals, clamps, fasteners, hoses, sensors, wiring, and surrounding clearance as applicable. Check for leaks or contact, then follow the manufacturer service and reinspection schedule.
Installation Instructions
- Drop-in replacement requires no cutting or tools beyond airbox access.
- Compatible with stock airbox hardware on Polaris Sportsman models.
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