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The K&N Engineering Universal Rubber Air Filter, part number knnRU-3580, is designed to provide exceptional airflow and filtration for a wide range of applications including racing vehicles, generators, snowmobiles, tractors, and radio-controlled cars. Its versatile design ensures compatibility with various air intake angles and offset diameters, making it suitable for many equipment types. Constructed with ultra-strong molded pliable rubber flanges, the filter absorbs vibration and ensures a secure attachment, while its stretchability of up to 1/16 inch (1.5mm) allows for a precise fit in between sizes. This feature enhances the filter's adaptability to different setups and reduces installation hassle. The filter's durable construction and reusable nature make it a cost-effective choice for enthusiasts seeking reliable performance over time.
The K&N universal air filter's high-quality materials and design support optimal airflow, which can contribute to improved engine efficiency and power. Its washable feature allows for easy cleaning and maintenance, extending the lifespan of the filter and maintaining peak performance. Whether used in racing engines, small machinery, or hobby vehicles, this filter offers a robust solution to air intake needs. Its compact dimensions and lightweight design also facilitate integration into various systems without adding significant weight or bulk.
As a product not approved under CARB regulations but acknowledged for its quality and performance, the K&N Universal Rubber Air Filter is an excellent choice for those prioritizing airflow and durability in their equipment. Its reliable construction and flexible fit make it suitable for numerous applications, ensuring your equipment operates smoothly and efficiently.
Features:
Order Processing
All orders are processed and shipped within 24 hours of purchase (excluding weekends and holidays).
Orders placed after 3:00 PM EST may ship the following business day.
Shipping Methods
Customers select their preferred shipping method and speed at checkout.
Shipping times are determined by the carrier and cannot be guaranteed by us.
Tracking information will be provided once your order has shipped.
Shipping Coverage
If your package arrives damaged, please notify the delivery driver immediately and contact the shipping carrier to file a claim.
You must report any missing or damaged items within 14 days of delivery.
After this time, we cannot be held responsible for lost or damaged items.
Return Window
You have 30 days from the date of delivery to request a return.
After 30 days, we are unable to accept returns, exchanges, or refund requests.
Eligibility
Items must be returned in their original condition—unused, unwashed, and with all tags and packaging intact.
Certain products may not be eligible for return (e.g., special-order items, customized products, or perishable goods).
Items that have been altered, installed, or modified cannot be returned.
Return Process
Contact our Customer Support team to request a Return Authorization (RMA) before sending items back.
Once your return is approved, you’ll receive instructions on where to send the product.
Customers are responsible for return shipping costs unless the item was defective or incorrect.
Refunds
Refunds are issued to the original payment method once the returned item has been received and inspected.
Please allow 5–10 business days for the refund to appear on your account.
In some cases, a restocking fee may apply (if applicable, this will be disclosed during your return authorization).
