- Baldwin Filters
 - Manufacturer of environmental filtration products for heavy-duty automobiles and trucks. Member of the Clarcor filtration products group. - Fleetguard
- Manufacturer of quality heavy and light duty filtration and cooling system products. Subsidiary of Cummins Engine Company.
- Green Cotton Air Filters
- Designs, manufactures, and supplies air filters for road and competition cars.
- Hastings Filters
- Manufactures automotive and commercial filters specializing in the traditional automotive jobber market.
- OilGuard
- Manufacturers of an onboard engine oil recycling system. Distribution opportunities available.
- Premier Products, Inc.
- Manufactures automotive air filters. Includes reference page.
- RCI Diesel Fuel Purifier
- Centrifugal fuel purifier designed to remove water and contaminants from diesel, gasoline and other fuels without using any filter elements or cartridges.
- Stanhope Products Company
- Manufacturer of desiccant bags and cartidges for moisture absorption in automotive air conditioning systems.
- Tecfil Filters
- Manufacturers of a complete line of air, fuel, lubricant, air and hydraulic filters for cars, trucks, buses, and tractors.
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