OLIFANT Air Filter Replacement Sets for Kohler 16–26 HP Engines — 2 Inner + 2 Outer Elements, OEM Fit

OLIFANT 2 Sets Air Filters replace Kohler 25-083-01S and 25-083-04-S (Wix 46438 & 42985), providing inner and outer filtration for 16–26 HP Kohler engines.

These two complete air-filter sets include two inner and two outer elements engineered for Kohler small engines used in lawn tractors, generators, and light commercial equipment. Built with quality filter paper and designed to trap dust and debris before it reaches the intake chamber, the filters follow the fit and function of OEM Kohler Part# 25-083-01S (outer) and 25-083-04-S (inner), and match Wix part numbers 46438 and 42985. They are suitable for a wide range of Kohler models including CV740, CV745, LH640, LH685, LH690 and other CH/CV/LH series engines in the 16–26 HP class.

What models and part numbers do these filters fit?

These OLIFANT sets are compatible with many Kohler CH, CV and LH series engines and correspond to specific OEM and aftermarket part numbers for easy replacement.

• Fits Kohler models: CH18–CH26, CV16–CV26, CH730–CH750, CV740, CV745, LH640, LH685, LH690, and related series.
• OEM/part cross-reference: Kohler Outer 25-083-01S and Inner 25-083-04-S.
• Aftermarket equivalents: Wix 46438 (outer) and Wix 42985 (inner).
• Suitable for 16 HP to 26 HP small engines commonly used in lawn and light commercial equipment.

How do these inner and outer elements work together?

The two-stage design uses an outer pre-filter and an inner fine element so larger particulates are captured first, extending the life of the inner filter and maintaining steady airflow to the engine.

• Outer filter traps larger debris, grass, and coarse dust.
• Inner filter captures fine dust and particles that could reach the intake chamber.
• Combined they reduce contaminant load on the engine for consistent operation.
• Pack includes two of each element for a full set replacement on dual-element housings.

What are the materials and quality details?

OLIFANT filters use quality filter paper and a sturdy frame construction to resist collapse and to keep filtration media positioned correctly during service life.

• High-grade filter paper media for effective particle retention without overly restricting airflow.
• Durable end caps and adhesive sealing to prevent bypass and ensure a tight fit.
• Engineered to match OEM dimensions for a reliable fit in stock housings.
• Sold as two inner + two outer elements to replace both stages on compatible engines.

When should these filters be replaced and how do I install them?

Replace filters according to your equipment maintenance schedule or sooner in dusty conditions; installation is straightforward and typically tool-light.

• Inspect filters each season or every 50 operating hours; replace sooner in heavy dust or mowing conditions.
• Installation: remove the airbox cover, extract old inner and outer filters, seat the new inner element, then fit the outer element and secure the cover.
• Ensure sealing surfaces are clean and aligned to avoid bypass.
• Refer to your engine manual for torque and specific service intervals.

Who is this for: These OLIFANT dual-filter sets are made for homeowners, landscapers, and light commercial operators who maintain Kohler-powered walk-behind mowers, zero-turn mowers, small generators, or equipment using 16–26 HP engines. They are for anyone who needs an affordable, OEM-compatible replacement that restores proper air filtration and helps preserve engine performance and longevity when installed and maintained per the equipment manufacturer’s guidelines.