HUSWELL Air Filter for Generac 14–22 kW Standby Generators (2013+ Evolution) — Direct-Fit Pleated Media, OEM Fit

HUSWELL 0J8478 / 0J8478S is a direct-fit replacement air filter designed for Generac 14–22 kW air-cooled standby generators (2013 Evolution series and later).

This replacement air element fits a wide range of Generac models that use the V-Twin 990cc and 999cc engines. It’s sized to match the original specification (approx. 9.37" x 5.43" x 1.34") so you get consistent airflow and a straightforward swap without custom modifications. Before ordering, verify your generator’s model and part number against the compatibility list to avoid returns.

Which Generac models and engines is this HUSWELL filter compatible with?

This filter replaces Generac part numbers 0J8478 and 0J8478S and works with many 2013+ Evolution series standby generators. It fits units from Guardian, Centurion and other series that use 14–22 kW V-Twin engines. Review the listed OEM references and serial ranges for precise fits.

• Fits V-Twin 990cc and 999cc engines used in 14–22 kW units.
• Replaces OEM references such as 0062750, 0062810, 0062440 and others in the 2013–2014 ranges.
• Compatible with generators branded as Guardian, Centurion, Eaton, Siemens and similar Evolution-series models.

How does the HUSWELL air filter install and what are the physical specs?

Installation is a simple swap: remove the old air element, seat the HUSWELL filter in the airbox, and secure the cover. Dimensions are made to match the original equipment so the seal and airflow characteristics remain unchanged. No trimming or adapters are required for direct replacements.

• Approximate external dimensions: Length 9.37" (24 cm), Width 5.43" (13.9 cm), Height 1.34" (3.4 cm).
• Standard pleated media designed to meet OEM fit and form requirements.
• Fits into the factory airbox without modification for quick servicing.

What performance and maintenance benefits can I expect from this replacement?

The HUSWELL element restores proper filtration and helps maintain engine breathing similar to the original part. Using a correctly sized filter reduces dirt ingestion, which supports reliable generator starts and steady operation under load. Replace it according to your generator’s maintenance schedule or sooner in dusty environments.

• Restores manufacturer-specified airflow and filtration balance.
• Helps reduce particulate buildup in the intake and on internal components.
• Shop-friendly replacement that lowers downtime during routine service.

Are there any fitment checks or precautions before purchase?

Always verify your generator’s model number, engine type, and OEM part number before ordering to ensure a correct match. Inspect the old filter and airbox to confirm seals and mounting surfaces are intact. If your unit has nonstandard modifications, compare measurements to the provided dimensions.

• Compare part numbers (0J8478 / 0J8478S) and OEM references listed in product details.
• Measure your current filter to confirm the approximate 9.37" x 5.43" x 1.34" size.
• Check for airbox damage or missing gaskets that could affect fit or performance.

Who is this for: This HUSWELL air filter is suited for owners, technicians, and fleet managers who service Generac standby generators from the 2013 Evolution series onward and need a reliable, direct-fit replacement for routine maintenance. It’s especially useful for sites requiring quick parts replacement to minimize downtime, and for anyone who wants an affordable alternative that matches OEM dimensions and compatibility lists. Remember to confirm your exact generator and part number before purchase to ensure proper fit.