K&N 2021-2024 Ford E350/E450 Super Duty Replacement Air Filter

K&N 2021-2024 Ford E350/E450 Super Duty Replacement Air Filter

Upgrade your 2021–2024 Ford E-350 or E-450 Super Duty with the K&N 33-5138 high-flow drop-in replacement air filter. Washable, reusable, and built for improved airflow and engine protection.

K&N 33-5138 Air Filter The K&N 33-5138 high-flow air filter increases engine airflow while maintaining high filtration for heavy-duty commercial vans and RVs.

The K&N High-Flow Replacement Air Filter (Part # 33-5138 is engineered to boost performance, acceleration, and engine protection for 2021–2024 Ford E-350 and E-450 Super Duty vehicles. Constructed with multiple layers of oiled cotton gauze media, this panel air filter allows up to 50% more airflow compared to standard paper filters while efficiently capturing dirt and contaminants.

Designed as a direct drop-in replacement, it fits directly into your factory Ford air box without any modifications required. Unlike disposable paper air filters, this K&N filter is washable and reusable, built to last for the lifetime of your vehicle and backed by K&N’s No-Hassle Lifetime Limited Warranty.

Best Uses

1. Commercial Fleets & Work Vans: Ideal for shuttle buses, delivery vans, and fleet vehicles that endure heavy daily driving and high mileage.
2. RVs & Motorhomes: Keeps Ford E-Series chassis motorhomes performing efficiently under heavy towing loads and steep climbs.
3. Towing & Hauling: Provides optimized airflow for high-demand engine conditions when hauling equipment or cargo.

Features

1. High-Flow Oiled Cotton Media: Features layered, oiled cotton gauze designed to maximize airflow into the engine intake.
2. Direct Drop-In Fitment: Precision-molded to fit the stock air box of 2021–2024 Ford E-350 / E-450 Super Duty models without custom tools or tuning.
3. Washable & Reusable: Can be cleaned and re-oiled using a K&N Recharger kit for long-term service.
4. Heavy-Duty Construction: Built with durable polyurethane edges to ensure a tight seal inside the air box.
5. Backed by Lifetime Limited Warranty: Protected under K&N's 10-Year/Million Mile Limited Warranty.

Benefits

1. Improved Horsepower & Acceleration: Increased airflow helps the engine breathe more freely for better throttle response.
2. Cost-Saving Design: Eliminates the need to buy disposable paper filters every maintenance interval, saving money over time.
3. Exceptional Engine Protection: Multi-layered filtration traps dust and foreign particles to guard critical engine parts.
4. Environmentally Friendly Choice: Reduces landfill waste generated by single-use paper engine filters.
5. Hassle-Free Maintenance: Long service intervals before requiring cleaning, making it easy to maintain for work and travel fleets.

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