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The K&N Engineering Universal Air Filter, model number knnRC-5178, is designed to provide versatile and reliable filtration for a wide range of applications including racing vehicles, generators, snowmobiles, tractors, and radio-controlled cars. Its oval straight design ensures compatibility with various air intake systems, accommodating different angles and offset diameters for optimal airflow. The filter features a rigid flange with a clamp-on hose connection, offering a secure and easy installation process.
Constructed for durability and reusability, this filter is washable, allowing you to clean and reuse it multiple times, which contributes to cost savings and environmental sustainability. The high-quality materials used in its manufacturing ensure long-lasting performance even under demanding conditions. Its compact dimensions and sturdy construction make it suitable for use in both automotive and equipment applications, providing consistent airflow and filtration efficiency.
This universal filter is not CARB-approved and requires acknowledgment of this status during installation. It is lightweight and designed for straightforward installation, making it an excellent choice for various custom and retrofit projects. Whether for enhancing engine performance or maintaining cleaner air intake systems, the K&N Universal Air Filter offers a dependable solution for a broad range of vehicles and machinery.
Features:
Fitment:
2003 Ford Excursion Eddie Bauer
2003 Ford Excursion Limited
2003 Ford Excursion XLT
2003 Ford F-250 Super Duty Lariat
2003 Ford F-250 Super Duty XL
2003 Ford F-250 Super Duty XLT
2003 Ford F-350 Super Duty King Ranch
2003 Ford F-350 Super Duty Lariat
2003 Ford F-350 Super Duty XL
2003 Ford F-350 Super Duty XLT
2004 Ford Excursion Eddie Bauer
2004 Ford Excursion Limited
2004 Ford Excursion XLS
2004 Ford Excursion XLT
2004 Ford F-250 Super Duty Harley-Davidson Edition
2004 Ford F-250 Super Duty King Ranch
2004 Ford F-250 Super Duty Lariat
2004 Ford F-250 Super Duty XL
2004 Ford F-250 Super Duty XLT
2004 Ford F-350 Super Duty King Ranch
2004 Ford F-350 Super Duty Lariat
2004 Ford F-350 Super Duty XL
2004 Ford F-350 Super Duty XLT
2005 Ford Excursion Eddie Bauer
2005 Ford Excursion Limited
2005 Ford Excursion XLS
2005 Ford Excursion XLT
2005 Ford F-250 Super Duty Harley-Davidson Edition
2005 Ford F-250 Super Duty King Ranch
2005 Ford F-250 Super Duty Lariat
2005 Ford F-250 Super Duty XL
2005 Ford F-250 Super Duty XLT
2005 Ford F-350 Super Duty Harley-Davidson Edition
2005 Ford F-350 Super Duty King Ranch
2005 Ford F-350 Super Duty Lariat
2005 Ford F-350 Super Duty XL
2005 Ford F-350 Super Duty XLT
2006 Ford F-250 Super Duty Harley-Davidson Edition
2006 Ford F-250 Super Duty King Ranch
2006 Ford F-250 Super Duty Lariat
2006 Ford F-250 Super Duty XL
2006 Ford F-250 Super Duty XLT
2006 Ford F-350 Super Duty Harley-Davidson Edition
2006 Ford F-350 Super Duty King Ranch
2006 Ford F-350 Super Duty Lariat
2006 Ford F-350 Super Duty XL
2006 Ford F-350 Super Duty XLT
2007 Ford F-250 Super Duty Harley-Davidson Edition
2007 Ford F-250 Super Duty King Ranch
2007 Ford F-250 Super Duty Lariat
2007 Ford F-250 Super Duty XL
2007 Ford F-250 Super Duty XLT
2007 Ford F-350 Super Duty Harley-Davidson Edition
2007 Ford F-350 Super Duty King Ranch
2007 Ford F-350 Super Duty Lariat
2007 Ford F-350 Super Duty XL
2007 Ford F-350 Super Duty XLT
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).
