Description
When you’re running your tractor or heavy equipment through dusty fields or construction sites, your engine needs every bit of protection it can get. This inner air filter element works alongside the outer filter to give your engine the cleanest air possible. It’s that second line of defense that catches the fine particles that slip past the primary filter—the stuff that can turn expensive engine parts into scrap metal if it gets through.
What You’re Getting
- Baldwin quality construction that handles the vibration and temperature swings of real work
- Pleated filter media with maximum surface area for better dirt-holding capacity
- Precise 4 11/32-inch outer diameter and 15 5/32-inch length for proper fit
- Inner safety element design that provides backup filtration when the outer filter gets loaded
- Direct replacement—installs without modifications or adapters
Built for Real Farm and Construction Work
This filter fits a wide range of equipment from trusted names like Deutz, Massey Ferguson, Liebherr, and Volvo. Whether you’re running a tractor through harvest dust, operating a loader in a gravel pit, or using construction equipment on a job site, this inner element provides that extra protection when conditions get really tough and your outer filter starts to load up.
Made to Last
Baldwin filters are built to handle the harsh realities of farm life—temperature swings, vibration, and constant exposure to dust that would overwhelm lesser filters. The robust construction and quality filtration media keep doing their job hour after hour, protecting your engine investment when the going gets dusty.
Good to Know
This is an inner element that fits inside the outer filter (RS3992), so you’ll want both when doing a complete air filter service. Always inspect your air cleaner housing for cracks or damaged seals while you’ve got the old filter out—any air leak here bypasses all your filtration. A quick tip: replace both inner and outer elements together for maximum protection during dusty seasons.






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