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The K&N Engineering Universal Rubber Air Filter, model RU-3610, is designed to provide reliable airflow for a wide range of applications including racing vehicles, generators, snowmobiles, tractors, and radio-controlled cars. Constructed with durable molded pliable rubber flanges, this filter absorbs vibrations and ensures a secure fit across various equipment setups. The flexible flange design allows stretching up to 1/16 inch (1.5mm), enabling compatibility with different intake sizes and angles. This versatility makes it suitable for many custom and off-road applications where standard filters may not fit.
Built with washable and reusable materials, the K&N RU-3610 air filter offers long-term value and consistent performance. Its high-quality construction ensures that it can withstand harsh operating conditions while maintaining optimal airflow. Whether used in racing scenarios or recreational equipment, this filter helps improve engine efficiency by providing a steady supply of clean air. The universal design simplifies installation across multiple vehicle types and machinery, making it an essential component for enthusiasts and professionals alike.
Measuring approximately 2.75 inches in flange diameter, with a base outer diameter of 5.875 inches, a top outer diameter of 4.75 inches, and a height of 7 inches, the K&N RU-3610 is a versatile choice for various air intake configurations. Its robust construction and flexible features ensure a secure fit and reliable performance, making it an ideal upgrade for improving airflow and engine performance in diverse applications.
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).
