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The K&N Engineering Universal Clamp-On Air Filter (Part Number: knnRU-4180) is designed to provide optimal airflow and versatile fit for a wide range of applications including racing vehicles, generators, snowmobiles, tractors, and RC cars. Crafted with durable, molded pliable rubber flanges, this filter absorbs vibrations and ensures a secure attachment while offering flexibility to stretch up to 1/16 inch to accommodate different sizes and angles. Its universal design makes it suitable for various equipment, regardless of the angle or offset of the air intake system. The filter's construction promotes longevity and easy maintenance, as it is washable and reusable for repeated use in demanding environments. This feature not only helps reduce replacement costs but also supports eco-friendly practices by minimizing waste. The filter is engineered to meet high-performance standards, providing consistent airflow and filtration, which are essential for optimal engine performance and reliability. Its compatibility with a broad array of vehicles and machinery makes it a versatile choice for enthusiasts and professionals alike who need a dependable air filtration solution that adapts to diverse setups. The K&N Universal Clamp-On Air Filter combines quality materials, thoughtful design, and ease of use to deliver a superior filtration experience for various automotive and equipment applications.
Features:
Fitment:
2004 Nissan Altima SE
2004 Nissan Maxima SE
2004 Nissan Maxima SL
2005 Nissan Altima SE
2005 Nissan Altima SE-R
2005 Nissan Altima SL
2005 Nissan Maxima SE
2005 Nissan Maxima SL
2006 Nissan Altima SE
2006 Nissan Altima SE-R
2006 Nissan Altima SL
2006 Nissan Maxima SE
2006 Nissan Maxima SL
2007 Nissan Maxima SE
2007 Nissan Maxima SL
2008 Nissan Maxima SE
2008 Nissan Maxima SL
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).
