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The K&N Engineering Air Oil Separator (Part Number KNN81-0800) is designed to protect your engine and intake system from harmful blowby gases by efficiently capturing oil before it can cause issues. This high-capacity reservoir prevents power loss and potential engine damage caused by oil buildup in the intake tract. Engineered specifically for 2011-2023 Ford F150 models equipped with 3.5L V6 gas engines, this separator offers a reliable solution to maintain optimal engine performance. Its installation takes approximately 30 minutes using basic tools, featuring factory-style hose connections that snap on and off easily, making setup straightforward even for DIY enthusiasts. The separator replaces the factory line from the crankcase, allowing flexible mounting options within your engine bay for convenience and optimal space utilization. The design ensures no tools are needed for checking or emptying the oil reservoir, simplifying maintenance and reducing downtime. Built with durability in mind, this separator is backed by K&N*s No-Hassle Lifetime Limited Warranty, providing peace of mind and long-term protection for your vehicle. It is important to note that this product is not CARB approved but complies with other standards for quality and performance. Regular use of the K&N Air Oil Separator helps keep your engine clean, prolongs its lifespan, and maintains peak power output by reducing oil contamination in the intake system.
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).
