10 Best Car Air Filters 4-inch
#1 Best Pick
KYOSTAR Universal 3/3.5/4" (75/89/100mm) High-Flow Air Filter, Reusable Cone Cold Air Intake, High Performance, Clamp-On Car High Flow Air Kit, Flange Diameter: 3/3.5/4 Inch, Height: 6.2 Inch, Black
Brand: Kyostar
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- 【Engineered for Better Performance】 KYOSTAR high-flow air filter uses advanced filter media, designed to improve air contact area and airflow, thereby enhancing horsepower, throttle response, and overall engine performance.
- 【Engine Protection】This air Intake filter features a three-layer protective design, including oiled synthetic filter media, high-quality cotton gauze, and polyurethane. It effectively blocks and captures harmful contaminants and can be reused after cleaning.
- 【Universal Fitment】Suitable for a wide range of vehicle models. This conical air filter has a flange with three replaceable inner diameters: 3/3.5/4" (75/89/100mm), flange length: 1" (24 mm), filter element height: 5.3" (135 mm). KYOSTAR also offers filters in various sizes and colors. Please confirm the size you need before purchasing.
- 【Easy Installation】This high flow filter kit features a universal clamp design for easy installation, avoiding the need for disposable filters. It is one of the most convenient and cost-effective vehicle upgrade options.
- 【After-Sales Support】KYOSTAR offers 1-year product warranty and provides technical support. However, we strongly recommend that you perform intake system upgrades under the guidance of a professional. When combined with ECU tuning, the vehicle can achieve even greater performance improvements.
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#2 Best Value
Red 4" 100mm Inlet Cone Replacement Dry Air Filter High Flow Car Performance Cold Air Intake Filter
Brand: WOOTON
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- Fitment:For neck size 4"(100mm) air inlet system.Please support the WOOTON brand air filter to ensure quality and service experience.
- Design:Round tapered increase in air contact area and increase inspiratory volume.
- Feature:The high flow air filter help engine to draw more cooler air resulting in better throttle response & higher explosive horsepower output,prevent abrasive particulate matter from entering the engine cylinders.
- Advantages:Washable and reusable air filter helps reduce replacement waste, which last longer than 10 disposable filters, and also save your money by avoiding disposable filters.
- Installation: It is very easy to install, you can easily complete the installation without complicated tools.
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#3 Budget Pick
4" Inlet Car Performance Washable Cold Air Intake Universal 100mm Clamp-on Cone Replacement Dry Air Filter (Red)
Brand: MIADILA
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- Fitment: For neck size 4"(100mm) air inlet system.
- Design: The overall conical shape, the deep pleats on the sides increase in air contact area and increase inspiratory volume.
- Material: The side is made of a three-layer synthetic filter fabric non-woven fabric.Quality materials used throughout including washable, oiled synthetic media, prevent abrasive particulate matter from entering the engine cylinders, so as to increase horsepower, torque and reduce the gas mileage.
- Performance: The high flow air filter improve engine's sport performance. By optimizing airflow, it enhances your vehicle's power and efficiency.The reusable nature of this filter helps reduce waste and contributes to a more sustainable vehicle maintenance routine.
- Installation: Air Filter designed with a simple clamp-on mechanism,you can easily complete the installation without complicated tools.
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#4 Top Choice
KAX Premium Washable Engine Air Filter, Universal Clamp-On Air Intake Filter, 4-Inch Round Tapered Air Intake Filter, Reusable, High Performance, 3" or 3.5" or 4"
Brand: KAX
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- ENHANCED ENGINE PERFORMANCE: Its special process increases air intake by 60% for better combustion, effectively reducing carbon build-up, improving efficiency, increasing horsepower and acceleration, while improving vehicle miles per gallon
- USE WITHOUT OIL: The KAX washable engine air filter is made of multi-layer non-woven fibre-laminated cotton yarn, use without oil and more economical and durable. The epoxy-coated aluminium mesh helps to hold the filter material in place and intercepts other particles that are harmful to the engine, providing 99.9% filtration performance
- WASHABLE & REUSABLE: KAX Premium washable engine filters, made of washable material, are washable and reusable, helping to reduce landfill waste and help reduce waste by avoiding disposable engine filters
- EASY TO INSTALL: 1:1 OE design fits directly into the factory air box without special tools or modifications.
- EASY TO CLEAN: Simply use a hairdryer or a dust blower to clean the surface of the dust build-up, or rinse it with water directly under the tap, air-dry it and you'll have a brand new engine air filter, ready to install again! Note: Do not use hot air or hot water for cleaning, high-pressure water guns, or hard brushes for scrubbing.
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#5 Popular Choice
FALVFUN Car Clamp-On Air Intake Filter, 3 In 3.5 In 4 In Round Tapered Vehicle Cone Air Filters, High-Performance ＆ Washable Auto Replacement Intake Filtering Accessories, Universal Fit (Green)
Brand: FALVFUN
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- Premium Material: This automotive air filter combines high-performance non-woven fabric with metal components, delivering exceptional filtration efficiency alongside long-lasting reusability. The non-woven fabric features a high-density multi-layer structure that effectively captures dust and other impurities while maintaining unobstructed airflow. The metal frame provides robust support, maintaining the filter's shape even under high airflow pressure while resisting rust and deformation.
- Universal Size: Measuring 5.82 x 6.01 x 4.8 inches, the design balances compactness with airflow capacity. Its small footprint fits most engine bays while ensuring sufficient intake for optimal engine performance. Three included adapter rings (76mm/89mm/102mm) enhance versatility, accommodating nearly all vehicle types: saloons, trucks, motorcycles, SUVs, and even compact MPVs.
- Easy Installation: Installation is straightforward and requires no specialised tools. First, select the appropriate adapter ring based on your vehicle's intake pipe dimensions and test-fit to confirm a snug seal. Then snap the adapter ring onto the filter's air inlet. Slide the combined filter-adapter assembly into the vehicle's intake pipe and secure it using the built-in clips. The filter surface is pre-coated with lubricant, eliminating the need for additional preparation.
- Enhances Airflow: The conical design increases the filter element's surface area in contact with air, drawing more cool, clean air into the engine. This influx of cooler air enhances combustion efficiency, resulting in increased horsepower and smoother acceleration. The tapered shape also reduces intake resistance—easing the engine's intake load and helping maintain performance during high-speed driving or heavy loads.
- Packaging Includes: This product comes in a bagged package, with each kit containing 1 premium conical air filter and 3 adapter rings, providing all necessary components for seamless installation. This all-in-one kit is suitable for: motorists seeking performance upgrades when replacing the filter element, or users needing to replace worn reusable filter elements.
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#6 Top Pick
4-Inch Cold Air Intake Filter - Washable, High Performance, 3" or 3-1/2" or 4" Clamp-On Replacement Air Filter (Purple, Tall)
Brand: muge racing
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- ENGINEERED POWER-Air Filter designed to increase horsepower and acceleration
- HIGH QUALITY - Constructed with non-woven synthetic media and ultra-strong molded pliable rubber flanges that absorb vibration and allow for secure attachment. Including washable, oiled synthetic media, urethane, and steel mesh
- DESIGN- With deep-pleated design, rounded bottom and swirl construction, cold air inatke will be easier, and reduce the suction load on the engine
- INSTALL EASY- Cone Air Filter built with simple clamp-on design and 3 sizes. Easy to assemble with all parts included
- REPLACEMENT- Cold Air Intake Filter dirt and protects your engine from harmful contaminants. Include adapter rings to fit intake tube with 3 inch, 3-1/2 inch and 4 inch diameter
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#7 Top Pick
FALVFUN Car Clamp-On Air Intake Filter, 3 In 3.5 In 4 In Round Tapered Vehicle Cone Air Filters, High-Performance ＆ Washable Auto Replacement Intake Filtering Accessories, Universal Fit (Gold)
Brand: FALVFUN
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- Premium Material: This automotive air filter combines high-performance non-woven fabric with metal components, delivering exceptional filtration efficiency alongside long-lasting reusability. The non-woven fabric features a high-density multi-layer structure that effectively captures dust and other impurities while maintaining unobstructed airflow. The metal frame provides robust support, maintaining the filter's shape even under high airflow pressure while resisting rust and deformation.
- Universal Size: Measuring 5.82 x 6.01 x 4.8 inches, the design balances compactness with airflow capacity. Its small footprint fits most engine bays while ensuring sufficient intake for optimal engine performance. Three included adapter rings (76mm/89mm/102mm) enhance versatility, accommodating nearly all vehicle types: saloons, trucks, motorcycles, SUVs, and even compact MPVs.
- Easy Installation: Installation is straightforward and requires no specialised tools. First, select the appropriate adapter ring based on your vehicle's intake pipe dimensions and test-fit to confirm a snug seal. Then snap the adapter ring onto the filter's air inlet. Slide the combined filter-adapter assembly into the vehicle's intake pipe and secure it using the built-in clips. The filter surface is pre-coated with lubricant, eliminating the need for additional preparation.
- Enhances Airflow: The conical design increases the filter element's surface area in contact with air, drawing more cool, clean air into the engine. This influx of cooler air enhances combustion efficiency, resulting in increased horsepower and smoother acceleration. The tapered shape also reduces intake resistance—easing the engine's intake load and helping maintain performance during high-speed driving or heavy loads.
- Packaging Includes: This product comes in a bagged package, with each kit containing 1 premium conical air filter and 3 adapter rings, providing all necessary components for seamless installation. This all-in-one kit is suitable for: motorists seeking performance upgrades when replacing the filter element, or users needing to replace worn reusable filter elements.
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#8 Top Pick
RIAYOOE 4 inch Cone Intake Filter for Engine Cold Air Inlet 76mm 89mm 101mm Performance Filters Universal for Racing Sport Car 3 Sizes in 1
Brand: RIAYOOE
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- Description: 3 3.5 4 inch cone inlet filter is designed to cold air intake
- Design: Conical design, the top is thickened sponge filter; side waist is made of non-woven fabric
- Material: It is dry fiber filter, can be used for a long time and can be reused after cleaning
- Features: Reusable & Washable
- Easy Installation: Clamp-on design, including 2 sizes reducer ring adapters (3 and 3.5 inch)
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#9 Top Pick
FALVFUN Car Clamp-On Air Intake Filter, 3 In 3.5 In 4 In Round Tapered Vehicle Cone Air Filters, High-Performance ＆ Washable Auto Replacement Intake Filtering Accessories, Universal Fit (Black)
Brand: FALVFUN
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- Premium Material: This automotive air filter combines high-performance non-woven fabric with metal components, delivering exceptional filtration efficiency alongside long-lasting reusability. The non-woven fabric features a high-density multi-layer structure that effectively captures dust and other impurities while maintaining unobstructed airflow. The metal frame provides robust support, maintaining the filter's shape even under high airflow pressure while resisting rust and deformation.
- Universal Size: Measuring 5.82 x 6.01 x 4.8 inches, the design balances compactness with airflow capacity. Its small footprint fits most engine bays while ensuring sufficient intake for optimal engine performance. Three included adapter rings (76mm/89mm/102mm) enhance versatility, accommodating nearly all vehicle types: saloons, trucks, motorcycles, SUVs, and even compact MPVs.
- Easy Installation: Installation is straightforward and requires no specialised tools. First, select the appropriate adapter ring based on your vehicle's intake pipe dimensions and test-fit to confirm a snug seal. Then snap the adapter ring onto the filter's air inlet. Slide the combined filter-adapter assembly into the vehicle's intake pipe and secure it using the built-in clips. The filter surface is pre-coated with lubricant, eliminating the need for additional preparation.
- Enhances Airflow: The conical design increases the filter element's surface area in contact with air, drawing more cool, clean air into the engine. This influx of cooler air enhances combustion efficiency, resulting in increased horsepower and smoother acceleration. The tapered shape also reduces intake resistance—easing the engine's intake load and helping maintain performance during high-speed driving or heavy loads.
- Packaging Includes: This product comes in a bagged package, with each kit containing 1 premium conical air filter and 3 adapter rings, providing all necessary components for seamless installation. This all-in-one kit is suitable for: motorists seeking performance upgrades when replacing the filter element, or users needing to replace worn reusable filter elements.
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#10 Top Pick
Genuine Bosch Cabin Filter AP-T04 | Activated Carbon Filter with Anti-Allergic, Fungicidal & Antibacterial Effects | Dimensions: 195mm Length, 215mm Width, 18mm Height
Brand: Bosch
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- The air filter ensures that the air inside the car is free from dust dirt and other harmful particles
- The filter helps to create a cleaner and healthier environment inside the car
- The cabin filter is usually located behind the glove compartment or under the dashboard
- It is made of a pleated filter paper that traps particles as the air flows through it
- 195mm x 215mm x 18mm dimensions with activated carbon for odor removal
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