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The K&N Engineering Universal Round Air Filter, model KNNU-3190, is designed to provide reliable airflow for a wide range of applications including racing vehicles, generators, snowmobiles, tractors, and remote-controlled cars. Its versatile design ensures compatibility with various equipment, regardless of angle or offset diameter of the air intake. Built with a high-quality, molded pliable rubber flange, this filter absorbs vibrations and offers a secure fit, while also allowing for slight stretching to accommodate slightly different sizes. This feature enhances installation flexibility and ensures a snug, vibration-free connection in demanding environments.
Constructed with a durable, washable, and reusable cotton-gain media, the K&N universal air filter maintains optimal airflow and filtration efficiency over time, reducing maintenance costs and improving engine performance. The filter's round shape and 4-inch outer diameter make it suitable for tight spaces, and its 6-inch height provides ample filtration surface area to support continuous operation. This model features a 2.75-inch internal flange diameter, making it adaptable to numerous air intake systems. Its robust design and materials are built to withstand harsh conditions, ensuring longevity and consistent performance.
Please note that this filter requires proper acknowledgment of CARB regulations and is not CARB-approved. It is suitable for non-emissions-critical applications and is designed for easy cleaning and reuse, making it a cost-effective choice for enthusiasts and professionals alike. Whether used in racing, recreational, or industrial equipment, this universal air filter offers dependable airflow, easy installation, and durability to support your operational needs.
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).
