Founded in 1996, Premium Guard Inc. develops aftermarket automotive filtration for cars, trucks and specialty vehicles, pairing broad application coverage with first-to-market product development. The company also provides turnkey private-label programs, supported by ISO-certified manufacturing and a diversified supply chain spanning Southeast Asia, Latin America and North America. Its newer work includes ViAQ, a diagnostic tool designed to assess cabin air-filter performance without removing the filter.
ISO-certified manufacturing
certification
2025 MOTOR Top 20 Award
certification
APC Filtration IncAs a second-generation family business, APC Filtration Inc. has spent more than 40 years developing custom air filtration for global original equipment manufacturers. The company is known for solving demanding equipment requirements through rapid prototyping and testing, and it operates a manufacturing and logistics network spanning the United States, Canada, and China. APC is now part of Rensa Filtration.BUFFALO, NY
Cosmos Air Purification & Environmental Systems IncEstablished in 1996, Cosmos Air Purification & Environmental Systems Inc. designs and manufactures air-filtration products and tailored clean-air systems for residential, commercial, and industrial settings. The Landover company became a one-stop filtration supplier after acquiring National Capital Filter Corporation in 1997, pairing custom filter manufacturing with change-outs, system design, and its Filternomics™ education program. Its project history includes filtration work associated with prominent Washington-area sites such as the Pentagon and the White House.HYATTSVILLE, MD
Green Filter USAFounded in 2001 by racer and parts manufacturer Mark German, Green Filter USA brings motorsports experience to its work in Pennsylvania. The company makes reusable performance air filters for drivers, racers, and engine builders, with its filters produced by hand from U.S.-manufactured materials.LEMONT FURNACE, PA
Air Techniques InternationalFounded in 1961, Air Techniques International is known for specialized testing equipment that helps verify the performance of filtration and protective systems. Its equipment supports on-site certification as well as larger-scale testing by manufacturers and laboratories, with calibration services accredited to ISO/IEC 17025.OWINGS MILLS, MD