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The K&N Engineering Universal Rubber Air Filter Part #knnR-0990 is designed to provide reliable air filtration across a wide range of applications, including racing vehicles, generators, snowmobiles, tractors, and radio-controlled cars. Constructed with durable, pliable rubber flanges, this filter absorbs vibrations and ensures a secure fit while allowing for slight adjustments of up to 1/16 inch to accommodate various intake diameters. Its universal design makes it suitable for different angles and offset diameters, making it a versatile choice for many equipment types.
Made from high-quality materials, the K&N universal air filter is washable and reusable, providing long-term value and consistent performance. It is an ideal replacement for OEM filters, although some modifications to jetting might be necessary to optimize performance in specific applications. The filter is engineered to fit a broad spectrum of machinery, from recreational to industrial equipment, ensuring that your air intake system remains clean and free of debris.
With its robust construction and adaptable design, the K&N R-0990 offers a reliable solution for maintaining optimal airflow and engine efficiency. Its compatibility with various equipment types and ease of installation make it a popular choice among professionals and enthusiasts alike. Designed to meet high standards of durability and performance, this universal air filter is an essential component for those seeking a dependable filtration solution that can be used across multiple machines and environments.
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).
