{"product_id":"k-n-engineering-81-0812-air-oil-separator-for-2020-2023-gm-6-6l-hd-trucks","title":"K\u0026N Engineering 81-0812 Air Oil Separator for 2020–2023 GM 6.6L HD Trucks","description":"The K\u0026amp;N Air Oil Separator protects the engine and intake tract from blowby by capturing the oil in our industry leading high capacity reservoir. This helps prevent power loss and possible engine damage caused by blowby. The K\u0026amp;N Air Oil Separator is quick and easy to install in about 30 minutes with basic tools and uses factory-style hose connections to quickly snap on and off. The oil separator replaces the factory line from the crank case allowing the oil separator to be mounted to a coinvent location in your engine bay. No tools are needed to check and empty the oil collector reservoir. Each unit is engineered specifically for your vehicle and is backed by our No-Hassle Lifetime Limited Warranty.\nThe K\u0026amp;N Air Oil Separator protects the engine and intake tract from blowby by capturing the oil in our industry leading high capacity reservoir.\n\u003cul\u003e\n  \u003cli\u003eNo-Hassle Lifetime Limited Warranty\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThe K\u0026amp;N Engineering 81-0812 Air Oil Separator is designed for select 2020–2023 Chevrolet Silverado 2500 HD, Chevrolet Silverado 3500 HD, GMC Sierra 2500 HD, and GMC Sierra 3500 HD trucks equipped with the 6.6L engine. It helps protect the engine and intake tract from crankcase blowby by capturing oil vapor and contaminants before they can circulate through the intake system. This can help reduce intake deposits, support consistent engine performance, and minimize potential power loss associated with blowby.\u003c\/p\u003e\n\n\u003cp\u003eEngineered specifically for compatible GM heavy-duty applications, the K\u0026amp;N 81-0812 replaces the factory crankcase line and can be mounted in a convenient location within the engine bay. Factory-style hose connections allow the separator to snap into place quickly, while installation typically takes about 30 minutes using basic hand tools. The high-capacity reservoir is designed for efficient collection, and the collector can be checked and emptied without tools. The unit is backed by K\u0026amp;N Engineering’s No-Hassle Lifetime Limited Warranty.\u003c\/p\u003e\n\n\u003ch3\u003eKey Product Specifications \u0026amp; Technical Data\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eBrand: K\u0026amp;N Engineering\u003c\/li\u003e\n  \u003cli\u003ePart Number: 81-0812\u003c\/li\u003e\n  \u003cli\u003eProduct Type: Air oil separator catch can\u003c\/li\u003e\n  \u003cli\u003eVehicle Application: Select GM heavy-duty trucks\u003c\/li\u003e\n  \u003cli\u003eEngine Application: 6.6L gasoline or diesel application as specified by vehicle fitment\u003c\/li\u003e\n  \u003cli\u003eInstallation: Direct replacement of the factory crankcase line\u003c\/li\u003e\n  \u003cli\u003eConnections: Factory-style quick-connect hose fittings\u003c\/li\u003e\n  \u003cli\u003eWarranty: No-Hassle Lifetime Limited Warranty\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat’s Included\u003c\/h3\u003e\n\u003cp\u003eOne K\u0026amp;N Engineering 81-0812 Air Oil Separator with vehicle-specific installation components. Verify vehicle and engine compatibility before installation. This product is not CARB approved and may not be legal for use on emissions-controlled vehicles in certain jurisdictions.\u003c\/p\u003e\u003cp\u003e\u003cb\u003eFeatures:\u003c\/b\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eBlowby Protection: Captures oil vapor and contaminants to help protect the engine and intake tract.\u003c\/li\u003e\n\u003cli\u003eHigh-Capacity Reservoir: Collects separated oil and contaminants while helping reduce intake system deposits.\u003c\/li\u003e\n\u003cli\u003eVehicle-Specific Design: Engineered for select 2020–2023 Chevrolet Silverado and GMC Sierra 2500 HD and 3500 HD applications.\u003c\/li\u003e\n\u003cli\u003eQuick Installation and Service: Uses factory-style hose connections, installs in about 30 minutes with basic tools, and allows tool-free reservoir inspection and emptying.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cbr\u003e\nFitments:\u003cbr\u003e\n2020 Chevrolet Silverado 2500 HD Custom\u003cbr\u003e\n2020 Chevrolet Silverado 2500 HD High Country\u003cbr\u003e\n2020 Chevrolet Silverado 2500 HD LT\u003cbr\u003e\n2020 Chevrolet Silverado 2500 HD LTZ\u003cbr\u003e\n2020 Chevrolet Silverado 2500 HD WT\u003cbr\u003e\n2020 Chevrolet Silverado 3500 HD High Country\u003cbr\u003e\n2020 Chevrolet Silverado 3500 HD LT\u003cbr\u003e\n2020 Chevrolet Silverado 3500 HD LTZ\u003cbr\u003e\n2020 Chevrolet Silverado 3500 HD WT\u003cbr\u003e\n2020 GMC Sierra 2500 HD AT4\u003cbr\u003e\n2020 GMC Sierra 2500 HD Base\u003cbr\u003e\n2020 GMC Sierra 2500 HD Denali\u003cbr\u003e\n2020 GMC Sierra 2500 HD SLE\u003cbr\u003e\n2020 GMC Sierra 2500 HD SLT\u003cbr\u003e\n2020 GMC Sierra 3500 HD AT4\u003cbr\u003e\n2020 GMC Sierra 3500 HD Base\u003cbr\u003e\n2020 GMC Sierra 3500 HD Denali\u003cbr\u003e\n2020 GMC Sierra 3500 HD SLE\u003cbr\u003e\n2020 GMC Sierra 3500 HD SLT\u003cbr\u003e\n2021 Chevrolet Silverado 2500 HD Custom\u003cbr\u003e\n2021 Chevrolet Silverado 2500 HD High Country\u003cbr\u003e\n2021 Chevrolet Silverado 2500 HD LT\u003cbr\u003e\n2021 Chevrolet Silverado 2500 HD LTZ\u003cbr\u003e\n2021 Chevrolet Silverado 2500 HD WT\u003cbr\u003e\n2021 Chevrolet Silverado 3500 HD High Country\u003cbr\u003e\n2021 Chevrolet Silverado 3500 HD LT\u003cbr\u003e\n2021 Chevrolet Silverado 3500 HD LTZ\u003cbr\u003e\n2021 Chevrolet Silverado 3500 HD WT\u003cbr\u003e\n2021 GMC Sierra 2500 HD AT4\u003cbr\u003e\n2021 GMC Sierra 2500 HD Base\u003cbr\u003e\n2021 GMC Sierra 2500 HD Denali\u003cbr\u003e\n2021 GMC Sierra 2500 HD SLE\u003cbr\u003e\n2021 GMC Sierra 2500 HD SLT\u003cbr\u003e\n2021 GMC Sierra 3500 HD AT4\u003cbr\u003e\n2021 GMC Sierra 3500 HD Base\u003cbr\u003e\n2021 GMC Sierra 3500 HD Denali\u003cbr\u003e\n2021 GMC Sierra 3500 HD SLE\u003cbr\u003e\n2021 GMC Sierra 3500 HD SLT\u003cbr\u003e\n2022 Chevrolet Silverado 2500 HD Custom\u003cbr\u003e\n2022 Chevrolet Silverado 2500 HD High Country\u003cbr\u003e\n2022 Chevrolet Silverado 2500 HD LT\u003cbr\u003e\n2022 Chevrolet Silverado 2500 HD LTZ\u003cbr\u003e\n2022 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