Discover our complete selection of round air filters designed for performance applications. Whether you need a round filter for your engine or an oval air filter variation, Green Filter has you covered. Browse our round air filter by size guide to find the perfect round engine air filter - all made in the USA with our lifetime warranty.
All measurements are in inches.
Filter Number | Outside Diameter (OD) | Inside Diameter (ID) | Height (H) | Shape | Color |
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Need help finding the right round air filter or round engine air filter? Use our vehicle selector or contact us for expert guidance on round air filters by size.
Measure your current filter's outside diameter, inside diameter, and height. Then compare those measurements with the round air filter size chart to find the closest matching Green Filter.
The main measurements are outside diameter, inside diameter, and height. These dimensions help confirm the correct fit for your engine, air cleaner assembly, or custom intake setup.
Yes. Use the size chart to compare filter number, outside diameter, inside diameter, height, shape, and color. This helps you find a round air filter by size without guessing.
A round air filter has a circular shape, while oval and rectangular air filters are designed for different air cleaner housings or custom fitment needs. Always match the shape and dimensions to your setup.
Yes. Green Filter round air filters are washable and reusable. They can be cleaned, re-oiled, and reinstalled for long-term performance and reduced replacement waste.
