Wix 42091 Air Filter

Engine Air Filter Protection

The Wix 42091 engine air filter is a panel-style replacement built for dependable airflow and engine protection in everyday driving. It is a direct-fit option for a wide range of Chevrolet, Pontiac, Buick, GMC, Ford, and Mercury applications, including classic Chevrolet Impala and Pontiac Catalina fitments.

Wix Premium Panel Air Filters are used for normal commuting, stop-and-go traffic, dirt roads, construction zones, short trips, and interstate travel. The 42091 uses enhanced cellulose media with phenolic resin treatment for added resistance to moisture, and the polyurethane seal is used where applicable for temperature durability.

Key Features

• Part number 42091 engine air filter
• Panel-style air filter with plastic ends
• Cellulose media with phenolic resin treatment
• 30% more media than OES filters, per manufacturer description
• ISO 5011 laboratory testing reports at least 99.5% efficiency based on Wix 42389
• 265 CFM rating for airflow support
• Compatible with many Chevrolet Impala, Pontiac Catalina, and Ford Sable applications

Detailed Description

The Wix 42091 is an engine air filter for drivers and restorers who need a replacement that matches OEM service intervals and common OE-style dimensions. With a 3.030-inch height, 11.500-inch top and bottom outer diameter, and 8.625-inch inner diameter bottom, it is built as a panel air filter for specific air cleaner housings. The Wix 42091 also cross-references NAPA Gold Filters 2091 for the same application.

Fitment coverage includes 1996-2001 Ford Sable, 1992-1994 Ford Tempo, 1992-1994 Mercury Topaz, and classic applications such as 1959-1967 Chevrolet Bel Air, 1959-1967 Chevrolet Impala, 1964-1967 Chevrolet El Camino, 1966-1967 Chevrolet Caprice, and 1964-1966 Chevrolet Malibu. It also fits select Pontiac and Buick models, including Pontiac Bonneville, Catalina, Grand Prix, LeMans, Tempest, Parisienne, Laurentian, and Buick Skylark and LeSabre.

What It Helps Address

• Restricted airflow from a dirty or clogged engine air filter
• Dust and debris entering the intake system
• Moisture-related media breakdown in demanding driving conditions
• Loss of filtration efficiency during routine service intervals
• Incorrect replacement sizing for listed Chevrolet, Pontiac, Buick, GMC, Ford, and Mercury vehicles

Installation Notes and Tips

Verify the air cleaner housing dimensions against the listed measurements before installation. Confirm vehicle year, make, model, and any notes such as the 1966 Pontiac applications without California Emissions or the 2BBL fuel delivery subtype listings. This Wix 42091 is positioned as an engine air filter replacement for the specified applications, including Chevrolet Impala and Pontiac Catalina fitments.

Quality Assurance

Wix states that this Premium Panel Air Filter line is tested to ISO 5011 standards and is recommended for OEM air filter change intervals. The filter media is treated for durability, and the seal material is used to withstand hot and cold temperature extremes where applicable.