Best 4 Inch Car Air Filters of 2026

RYANSTAR High Flow Air Filter is a universal car air filter designed to boost horsepower and acceleration. Its adjustable diameter makes installation a breeze. The unique clamp-on design is washable and reusable, ensuring engine protection. With high air flow and excellent filtration provided by the two-layered mesh material, this filter equipped with a stainless steel clamp offers durability and convenience.

The Cartman Clamp-On Engine Air Filter is a premium high-performance replacement filter designed to increase horsepower and acceleration, with easy installation due to its pre-oiled and simple clamp-on design. The filter is washable and reusable, reducing replacement waste and saving money. It is constructed with non-woven synthetic media and ultra-strong molded pliable rubber flanges that absorb vibration and allow for secure attachment. The filter comes with adapter rings to fit intake tubes with 3 inch, 3-1/2 inch, and 4-inch diameters, providing world-class protection by filtering dirt and protecting the engine from harmful contaminants.

The KIPA Chrome Air Filter is designed to fit carburetors with neck diameters of 2 5/8" or 2 5/16", making it versatile for various setups. Its washable and reusable filter element saves you money and reduces waste, as you can clean it instead of replacing it frequently. The assembly comes complete with all necessary hardware such as washers, lock nuts, bushings, bolts, and plates, so you have everything needed for a smooth installation. Made from chromed performance steel, the durable metal plates ensure long-lasting use and help your carburetor perform at its best by improving airflow.

The WOOTON Red 4" Air Filter is a high-performance cold air intake filter designed to fit 4" (100mm) air inlet systems. Its round tapered design increases the air contact area and inspiratory volume, allowing the engine to draw in more cooler air. This results in better throttle response and higher explosive horsepower output. The filter also serves as a protective barrier, preventing abrasive particulate matter from entering the engine cylinders. One of the advantages of this filter is that it is washable and reusable, reducing replacement waste and saving you money in the long run. Additionally, it is easy to install, requiring no complicated tools. Upgrade your car or truck's air filtration system with the WOOTON Air Filter for improved engine performance and longevity.

The Lucky Seven Onan Air Filter comes as a convenient 2-pack designed for Onan generators, including models like the Camp Power/QG RV and MicroLite RV QG. These filters are sized perfectly with an outer diameter of 3 3/8 inches, inner diameter of 2 1/8 inches, and a height of 4 3/8 inches, making them easy to install on compatible generators. As high-quality aftermarket replacements for the original Onan 140-3280 and 48-2017 filters, they help keep your generator running smoothly by effectively filtering the air. This ensures your generator maintains optimal performance and longevity, saving you time and money on maintenance.

The HEYZLASS Honda GX Air Filter is designed to replace genuine Honda air filters for various GX series engines, making it easy for you to maintain your equipment. It fits several Honda models and engine sizes, ensuring compatibility and convenience. This filter works well with a wide range of equipment, including pressure washers, generators, tillers, and water pumps, so you can trust it for multiple uses. Made with high-quality filter paper and protective metal mesh, it effectively keeps dust and debris out of your engine. Plus, the included foam pre-filter adds an extra layer of protection, helping your engine run cleaner and longer.

The MIADILA Cold Air Filter comes with three inlet sizes (3", 3.5", and 4") to fit most vehicles, giving you flexibility and convenience. Its cone shape with deep pleats and a honeycomb mesh design increases the air intake area, allowing your engine to breathe better. Made from high-quality materials like washable synthetic fabric and thick sponge, it ensures durability and easy maintenance. This dry, reusable filter helps protect your engine from dirt and harmful particles while reducing waste, making it a practical and eco-friendly choice for your car.

RIAYOOE Air Filter is a universal fit performance part that offers reusability and washability. It provides easy installation for your convenience. The reusable feature allows you to save money on replacements. Washable design ensures long-lasting use. Easy installation saves you time and effort.

The TIEVISHO Cold Air Filter offers a versatile design with three inlet sizes—3, 3.5, and 4 inches—making it easy to find the perfect fit for your vehicle. Made from high-quality synthetic materials, it features a deep-pleated filter element that helps trap dirt while allowing more air to flow, which can boost your car's power and acceleration. This filter comes pre-oiled and uses a simple clamp-on system, so you can install it quickly without extra parts or tools. Plus, it’s washable, so you can clean and reuse it, saving you money and reducing waste over time.

The VVORHSBELL Intake Kit is designed specifically for Dodge Ram 2500 and 3500 models with the 6.7L Cummins engine from 2007.5 to 2012. It features a 4-inch cold air intake pipe that helps improve your engine's airflow, potentially boosting performance. Made from high-quality aluminum alloy and steel, this kit resists corrosion, ensuring durability and long-lasting use. The aluminum tubes are precisely bent using CNC mandrel technology, which means smoother airflow and better engine efficiency. Before purchasing, make sure to confirm your vehicle's part number and model to get a perfect fit and easy installation.