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The K&N Engineering Air Oil Separator helps protect the engine and intake tract by capturing oil from crankcase blowby in a high-capacity reservoir. By reducing the oil carried into the intake system, this separator is designed to help prevent power loss and possible engine damage associated with blowby.
Part number knn81-0810 is engineered specifically for the 2021-2022 Ford Bronco with the 2.7L engine. It replaces the factory crankcase line and can be mounted in a convenient location within the engine bay. Factory-style hose connections allow the unit to snap on and off quickly for installation and service.
Installation takes about 30 minutes using basic tools. The oil collector reservoir can be checked and emptied without tools, making routine maintenance straightforward. The K&N Engineering Air Oil Separator is backed by a No-Hassle Lifetime Limited Warranty.
This product is not CARB approved. Review applicable vehicle and emissions requirements before installation.
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).
