K&N air oil separator mounted in a Silverado 1500 engine bay for blowby protection
Close-up of OEM-style connectors on the K&N air oil separator
Reservoir close-up showing high-capacity design that holds oil away from intake
Engine bay installation of the K&N air oil separator with OEM-style connectors
K&N air oil separator lifetime warranty badge for confident ownership
K&N air oil separator mounted in a Silverado 1500 engine bay for blowby protection
Close-up of OEM-style connectors on the K&N air oil separator
Reservoir close-up showing high-capacity design that holds oil away from intake
Engine bay installation of the K&N air oil separator with OEM-style connectors
K&N air oil separator lifetime warranty badge for confident ownership

K&N Air Oil Separator 81-0805 for Silverado 1500 and GM SUVs

Protect your engine and intake with the K&N Air Oil Separator The K&N Air Oil Separator (81-0805)...
Vendor: K&N
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£150.62
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K&N air oil separator mounted in a Silverado 1500 engine bay for blowby protection

K&N Air Oil Separator 81-0805 for Silverado 1500 and GM SUVs

£150.62
K&N air oil separator mounted in a Silverado 1500 engine bay for blowby protection
Close-up of OEM-style connectors on the K&N air oil separator
Reservoir close-up showing high-capacity design that holds oil away from intake
Engine bay installation of the K&N air oil separator with OEM-style connectors
K&N air oil separator lifetime warranty badge for confident ownership

K&N Air Oil Separator 81-0805 for Silverado 1500 and GM SUVs

£150.62
Description
Description
x

Protect your engine and intake with the K&N Air Oil Separator

The K&N Air Oil Separator (81-0805) is designed to capture oil carried by blowby before it reaches the intake. Its high-capacity reservoir helps keep the intake tract cleaner, which can support consistent air flow and throttle response. This unit is engineered to fit GM trucks and SUVs, and is positioned to replace the factory line from the crankcase for a neat, engine-bay install.

Designed for ease of use, the separator mounts to a convenient spot in the engine bay and uses factory-style hose connections for a clean, secure fit. You can install it in about 30 minutes with basic tools, and there are no tools required to check or empty the reservoir once it’s in place.

What it does

  • High-capacity reservoir traps oil and prevents oil contamination of intake air
  • Helps shield against potential power loss associated with blowby under typical driving
  • Reduces oil and contaminants buildup in the intake manifold for steady performance
  • Engineered with premium OEM-style connectors and robust hoses for lasting durability

Install, maintenance, and fit

  • 30-minute installation with factory-style hose connections
  • Mounts in a convenient engine-bay location for easy access
  • No tools needed to check or empty the reservoir
  • Replaces the factory line from the crankcase for a streamlined setup

Durability and warranty

  • Premium components designed for reliable, long-term performance
  • No-Hassle Lifetime Limited Warranty backed by K&N

Note: This product is not legal for sale or use in California on pollution-controlled motor vehicles.

FAQ

Q: Which vehicles is the K&N Air Oil Separator compatible with?

A: Compatible with 2014–2018 Silverado 1500, 2015–2020 Suburban and Tahoe, and 2015–2020 Yukon, plus related GMC Sierra 1500 models.

Q: Is installation tool-free and how do I check the reservoir?

A: Yes, installation takes about 30 minutes and reservoir checks require no tools.

Shipping & Return
Shipping & Return
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Returns Policy

You may return most new, unopened items within 30 days of delivery for a full refund. We'll also pay the return shipping costs if the return is a result of our error (you received an incorrect or defective item, etc.).

You should expect to receive your refund within four weeks of giving your package to the return shipper, however, in many cases you will receive a refund more quickly. This time period includes the transit time for us to receive your return from the shipper (5 to 10 business days), the time it takes us to process your return once we receive it (3 to 5 business days), and the time it takes your bank to process our refund request (5 to 10 business days).

If you need to return an item, simply login to your account, view the order using the "Complete Orders" link under the My Account menu and click the Return Item(s) button. We'll notify you via e-mail of your refund once we've received and processed the returned item.

Shipping

We can ship to virtually any address in the world. Note that there are restrictions on some products, and some products cannot be shipped to international destinations.

When you place an order, we will estimate shipping and delivery dates for you based on the availability of your items and the shipping options you choose. Depending on the shipping provider you choose, shipping date estimates may appear on the shipping quotes page.

Please also note that the shipping rates for many items we sell are weight-based. The weight of any such item can be found on its detail page. To reflect the policies of the shipping companies we use, all weights will be rounded up to the next full pound.

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