Best 4 Inch Car Air Filters of 2025

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 RYANSTAR High Flow Filter is designed to boost your vehicle's horsepower and acceleration, making your driving experience more thrilling. With its adjustable diameter, installation is a breeze, allowing you to fit it perfectly into your car. This unique clamp-on filter is not only washable and reusable but also helps protect your engine from dust and debris. Additionally, the two-layered mesh construction ensures high airflow while maintaining excellent filtration, so you can enjoy a cleaner engine and improved performance.

This universal replacement air intake filter is designed for cars and provides high air flow to increase horsepower and throttle response. The filter is made with two layers of mesh material and is both reusable and washable. It comes with a stainless steel clamp and is easy to assemble with all parts included.

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 Rtunes Racing Air Filter is a universal replacement filter designed to improve the performance of your truck. With its high air flow, it increases horsepower and throttle response, allowing for a smoother and more powerful driving experience. The filter is made with two layers of mesh material, providing excellent filtration while still allowing for maximum airflow. It is also reusable and washable, making maintenance a breeze. The filter comes with a stainless steel clamp and is easy to assemble with all parts included. Upgrade your truck's air intake system with the Rtunes Racing Air Filter for improved performance and durability.

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 Spectre Air Filter is a high-performance, premium replacement filter designed to fit all 4 inch air cleaners. With its flame retardant and paper filter construction, this filter offers durability and reliability. The lifetime warranty ensures peace of mind for the users. The flame retardant feature provides added safety and protection, making it suitable for various applications. The paper filter construction effectively captures dirt and debris, improving the overall air quality and engine performance. With the Spectre Air Filter, you can experience enhanced airflow and increased horsepower, allowing for a smoother and more efficient driving experience. Whether you're a car enthusiast or simply looking to improve your vehicle's performance, the Spectre Air Filter is a great choice.

The Muge Racing Air Filter is designed to enhance your vehicle’s performance by boosting horsepower and acceleration. Its conical shape features a thick sponge top and non-woven fabric sides, allowing for improved airflow and reduced engine strain. This filter protects your engine from dirt and harmful contaminants, ensuring longevity and reliability. With included adapter rings, it easily fits intake tubes of various sizes—3 inches, 3.5 inches, and 4 inches. Installation is a breeze thanks to its simple clamp-on design, making it user-friendly for any car enthusiast.

RIAYOOE Air Filter is a high-performance cone air filter suitable for cold air intake, enhancing your engine's sport performance. The conical design with a thickened sponge filter at the top and non-woven fabric on the sides reduces engine suction load, making it easier for air intake. This dry air filter is reusable and washable, requiring cleaning every 5,000 to 10,000 kilometers. With a simple clamp-on design and included reducer ring adapters, it offers easy installation for increased engine power.

The Mishimoto Performance Air Filter is a high-quality oiled filter that provides optimal airflow and superior filtration. With its 8-layer cotton filter material, it ensures clean and efficient air intake for your car. The best part is that it is fully cleanable and reusable, which means you can use it for a lifetime of service. The universal fitment of this air filter makes it compatible with various car models, and it comes with a high-quality clamp for easy installation. Additionally, Mishimoto offers a lifetime warranty for this air filter, giving you peace of mind. Upgrade your car's air filtration system with the Mishimoto Performance Air Filter and enjoy improved performance and longevity.