The AF25708M from FLEETGUARD is an advanced air filter integrated with Combustion Core technology, engineered for heavy-duty engines. It serves construction, agriculture, and long-haul transportation sectors, delivering cutting-edge contaminant protection for critical engine components. It maintains consistent airflow while meeting or exceeding OEM specifications, effectively extending equipment service life. For operators facing high-stress, dusty environments, this filter is a reliable choice that reduces maintenance downtime and minimizes repair costs.

This filter leverages premium multi-layered Combustion Core filtration media to achieve exceptional purification results. It captures airborne dust, sand, abrasive particles, and fine debris as small as 0.3 microns, boasting a 99.9% filtration efficiency. Adhering to strict ISO 5011 standards, it targets contaminants that cause premature engine wear, combustion inefficiencies, and performance degradation. Moreover, its enhanced media structure resists tearing and clogging—even in extreme dust conditions like construction sites or agricultural fields. With an outside-in flow direction design, it intercepts pollutants on the media’s outer layer first. This ensures unobstructed airflow during extended service intervals, optimizing fuel combustion and sustaining reliable engine power output.

The AF25708M boasts a rugged construction tailored to heavy-duty operational demands. Its precision radial seal design forms a tight, leak-proof fit with the filter housing, eliminating bypass gaps that allow unfiltered air to enter the engine. Weighing 2.4 lbs, the filter features a compact yet durable build: overall height of 15.3 in (388.62 mm), outer diameter of 6.1 in (154.94 mm), and inner diameter of 3.7 in (93.98 mm). Additionally, its corrosion-resistant reinforced housing resists impact, vibration, and extreme temperatures from -25°F to 260°F. This sturdy design maintains structural integrity on rough job sites, during continuous long-haul operations, or in high-humidity conditions.

The AF25708M offers extensive compatibility with leading heavy-duty equipment brands, making it a versatile replacement option. It fits seamlessly with Caterpillar C15, C16, and 3406 models, as well as John Deere 9570R, 8570R, and 7570R series. Beyond that, it serves as a direct replacement for Caterpillar part 166-6640 and John Deere part RE504230, with cross-references to Baldwin RS3640, Donaldson P532650, and Wix 46540 filters. In terms of installation, its standardized size and straightforward design enable tool-free, quick replacement—no specialized training required. Furthermore, its lightweight yet sturdy build eases handling during maintenance, saving technicians time and reducing equipment downtime.

For more details on the AF25708M FLEETGUARD Advanced Air Filter – Combustion Core, including full compatibility guides and purchasing options, visit: kxfilter.com