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The K&N Engineering Air Oil Separator (Part #knn81-0809) is designed to protect your engine and intake system from harmful blowby by capturing excess oil in a high-capacity reservoir. This advanced oil separator helps maintain optimal engine performance by preventing oil vapors from entering the intake, which can cause power loss and long-term engine damage. Easy to install, it typically takes about 30 minutes using basic hand tools, with factory-style hose connections that snap on securely for a quick setup. The unit replaces the factory crankcase vent line, allowing for flexible mounting options within your engine bay to suit your vehicle*s layout. The reservoir can be checked and emptied without any tools, making maintenance straightforward and hassle-free. Engineered specifically for the 2021+ Ford Bronco with a 2.3L L4 engine, this separator ensures a perfect fit and reliable operation. Backed by K&N*s No-Hassle Lifetime Limited Warranty, it offers a durable and long-lasting solution for serious enthusiasts looking to enhance engine longevity and maintain peak performance. This product is not CARB approved but is compliant with other regulations and is suitable for daily use. Its robust construction and simple installation make it an excellent upgrade for your Bronco*s engine bay, providing peace of mind and improved engine health over time.
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).
