Wix 42784 Engine Air Filter

Engine Air Filter for Heavy-Duty Air Intake

The Wix 42784 engine air filter is built for heavy-duty air intake systems that need consistent airflow and high-efficiency contaminant capture. It uses premium cellulose media with a durable metal-end construction to support OEM-style service intervals in demanding applications.

• Engine air filter for heavy-duty duty cycles
• Cellulose media with 99.9% contaminant removal efficiency in ISO 5011 laboratory testing, based on Wix reference filters
• Metal ends for added durability
• 23.000-inch height with 8.850-inch outer diameter and 5.450-inch inner diameter bottom
• 500 CFM rating for airflow support
• Closed top design

Built for Airflow and Filtration

Wix 42784 is an HD air filter designed around premium filtration media and a reinforced structure for long service life. The expanded metal body and corrosion-resistant end-cap construction help maintain filter integrity, while the pleat-stabilized media design supports consistent performance during normal service intervals. This part cross-references Donaldson P128955 and Fleetguard AF966 for the same application.

Compatible With heavy-duty equipment applications that use the Wix 42784 air filter format, including select Caterpillar, General Motors, and NAPA Gold Filters cross-reference applications. Use this part when you need a replacement engine air filter that matches the listed dimensions and airflow requirements.

Common Problems This Filter Helps Address

• Restricted engine airflow from a loaded or dirty air filter
• Dust and debris entering the intake system
• Premature wear caused by inadequate intake filtration
• Service interval replacement for OEM-style maintenance schedules
• Loss of filtration integrity from a damaged or collapsing filter element

Installation Notes and Tips

Verify the filter dimensions, end style, and intake housing requirements before installation. Confirm the 23.000-inch height, 8.850-inch outer diameter, and 5.450-inch bottom inner diameter against the existing filter or housing specifications. Replace the filter at the recommended service interval, and inspect the air cleaner housing for dirt or sealing damage during service.

Quality Assurance

Wix HD air filters are built with premium filtration media and durable construction materials for demanding service conditions. Laboratory testing referenced to ISO 5011 shows minimum efficiency of 99.9% contaminant removal on Wix test filters used for the stated performance basis.