FA-2599 Lone Star High-Flow Washable Air Filter – OEM Replacement for 2599-Style Filters
FA-2599 Lone Star Replacement Filter
After 40 years working on heavy-duty diesels, I’ve seen airflow issues do more damage quietly than most hard failures ever will. OEM paper filters look fine when they’re new, but once they start loading up, restriction climbs fast. That restriction turns into heat, soot, sluggish boost response, and DPF systems that regen harder than they should.
That’s why I designed the FA-2599 Lone Star.
This is a high-flow, washable air filter engineered to maintain airflow over time instead of suffocating the intake as miles add up. The synthetic filter media resists collapse and airflow drop-off under sustained load, keeping the turbo in its efficiency range and combustion stable.
Sealing matters just as much as airflow. The FA-2599 Lone Star uses OEM-matched sealing geometry so air goes through the filter — not around it. That protects the turbo, charge-air cooler, and engine internals from dusting and contamination.
Instead of throwing away paper filters every service interval, you wash the FA-2599 Lone Star, oil it correctly, reinstall it, and keep running. One filter replaces years of disposable elements, reduces downtime, and lowers long-term operating cost without sacrificing engine protection.
Compatibility Note:
If your truck calls for an OEM 2599-style air filter, the FA-2599 Lone Star is a direct drop-in replacement with no modifications required.
OEM Cross-Reference Table
| OEM Part # | Truck / Engine Application | Year Range | Replaces With |
|---|---|---|---|
| 2599-Style OEM Filter | Heavy-Duty Diesel Applications | Based on OEM match | FA-2599 Lone Star |
| OEM 2599 Paper Filter | Diesel Engines | Based on OEM match | FA-2599 Lone Star |
Features & Benefits
Features
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High-flow washable synthetic filter media
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OEM-matched sealing flange for airtight fit
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Designed for turbocharged diesel airflow demands
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Reusable, serviceable construction
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Drop-in replacement for 2599-style filters
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Built for high-mileage and fleet use
Benefits
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Maintains consistent airflow under load
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Reduces intake restriction over time
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Helps reduce forced DPF regens
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Lower exhaust gas temperatures
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Improved throttle response
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Less downtime from filter changes
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Long-term savings vs disposable paper filters
Competitor Differentiation
Most disposable paper filters are designed to be replaced — not to protect engines long-term. As paper loads with dirt, restriction spikes, fuel economy drops, and regens increase.
I built the FA-2599 Lone Star to hold airflow steady over time, not just test well out of the box. Washable media keeps restriction lower, sealing surfaces actually seal, and the filter doesn’t become trash after one dirty service cycle.
Disposable filters keep you buying. A properly engineered washable filter keeps your engine breathing right and your operating costs under control for the long haul.
These Dual Filters will be $699.00 with an exchange of your old filter. There is a $525.00 core charge included. The core filters must have no broken clips/tabs.