K&N High-Flow Engine Air Filter 33-5049 for 2016–2026 Buick/Chevrolet/Cadillac — Washable, Lifetime Performance

K&N 33-5049 is a washable, reusable high-flow engine air filter engineered to increase airflow and improve throttle response while lasting for the life of your vehicle.

This premium K&N replacement fits a broad range of Buick, Chevrolet, Cadillac, Holden, Opel and Vauxhall models from 2016–2026 and is designed to drop into the factory air box for an easy install. Built from multiple layers of oiled cotton gauze and reinforced construction, the filter boosts airflow up to 50% versus typical paper filters and is backed by K&N's limited lifetime warranty. Because it's washable and reusable, it also reduces recurring parts purchases and landfill waste compared with disposable filters.

How does this filter improve my car's performance?

By supplying more clean air to the engine with lower restriction, the K&N high-flow media can help the engine breathe easier under load, which often results in improved throttle response and modest increases in horsepower and acceleration. The performance gain varies by vehicle and conditions, and the filter is designed to work seamlessly with your stock intake system.

• High-flow cotton gauze increases airflow versus paper filters.
• Multi-layer filtration traps contaminants while allowing higher volume air delivery.
• Tested on race tracks and street applications to validate durability.

How often do I need to clean and maintain it?

K&N filters are pre-oiled and ready for installation and generally require cleaning far less often than disposable filters. Under normal highway driving, the filter typically only needs cleaning every 75,000 miles; dusty or severe conditions will require earlier service. When cleaning is necessary, K&N supplies a cleaning kit and straightforward instructions to restore performance.

• Recommended cleaning interval: about 75,000 miles under normal highway use.
• Clean and re-oil using K&N cleaning kit for best results.
• Reusable design eliminates frequent replacement purchases.

Is installation difficult and will it fit my vehicle?

The 33-5049 is engineered to match the factory air box dimensions for the listed vehicle applications, so installation is typically a simple drop-in swap that can be completed in minutes with basic tools. No modification to the intake system is required, and the filter retains factory sealing to protect the engine from contaminants.

• Direct fit for compatible Buick, Chevrolet, Cadillac, Holden, Opel and Vauxhall models.
• Pre-oiled and ready to install—standard home tools are usually sufficient.
• Designed to seal like OEM parts and maintain engine protection.

What are the construction and warranty details?

This K&N filter uses four layers of premium cotton gauze treated with a tacking agent to trap dirt while preserving airflow, framed by rugged materials for long life. It is proudly made in the USA and comes with K&N's limited 10-year/million-mile warranty on appropriate applications, providing long-term peace of mind when used as a direct replacement.

• Four-layer oiled cotton gauze filtration media for lasting protection.
• Durable construction intended for lifetime use with proper care.
• K&N's limited warranty and support from a recognized filtration brand.

Who is this for: Drivers who own a compatible 2016–2026 Buick, Chevrolet, Cadillac, Holden, Opel or Vauxhall model and want a durable, eco-friendlier alternative to disposable paper filters. Ideal for those seeking improved airflow and throttle feel with minimal maintenance cost over the life of the vehicle. If you prefer a simple, bolt-in upgrade that’s washable and backed by an established performance brand, the K&N 33-5049 is a practical choice.