How often should I clean my K&N air filter?

K&N recommends cleaning your filter every 50,000 miles under normal driving conditions. If you drive in dusty or off-road conditions, you may need to clean it more frequently. Use a K&N filter cleaning kit to properly clean and re-oil the filter.

Does this filter require oiling?

Yes, this K&N air filter uses a specially formulated oil to help trap dirt and contaminants. The oil is part of what allows it to achieve both high airflow and high filtration efficiency. You will need to re-oil the filter after cleaning.

Is this filter CARB-compliant?

This K&N air filter is street legal in all 50 US states. It has been granted an exemption by the California Air Resources Board (CARB) and is legal for use on pollution-controlled vehicles.

K&N 18-21 Chevrolet Express 2500 4.3L V6 Replacement Air Filter

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Specifications

Brand: K&N
Part #: 33-5114
UPC: 024844392787

K&N 18-21 Chevrolet Express 2500 4.3L V6 Replacement Air Filter

Name: K&N 18-21 Chevrolet Express 2500 4.3L V6 Replacement Air Filter
Brand: K&N
Price: 68.99 USD
Availability: InStock

$68.99

On Backorder

Order now to reserve yours — we'll ship as soon as stock arrives. Full refund if we're unable to fulfill.

Washable and reusable air filter improves airflow and is designed to last the life of your vehicle.

Key Features

Washable — can be cleaned and reused
Reusable — saves money on replacement filters
Oiled cotton media — traps dirt without sacrificing airflow
Direct drop-in replacement — installs in the factory airbox
Designed to last the life of your vehicle — backed by K&N's No-Hassle Lifetime Limited Warranty

⚠️ CA WARNING: This product can expose you to chemicals known to the State of California to cause cancer and/or birth defects or other reproductive harm. Learn more

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Product Details

K&N washable, reusable High-Flow Air Filters feature a state-of-the-art design of layered, oiled cotton media engineered to improve airflow and capture contaminants, and are designed to provide an increase in horsepower. Each performance air filter is reusable, engineered to last for the entire lifespan of your vehicle, and backed by K&N's No-Hassle Lifetime Limited Warranty. K&N drop-in replacement filters are designed to install easily into your factory air box. Upgrade today and start enjoying superior airflow and superior performance from K&N's most popular product!