FA-6149 High-Flow Washable Air Filter – Replaces OEM 6149-Style Air Filters
FA-6149 high-flow, washable air filter,
After decades working on heavy-duty diesels, I’ve learned that intake restriction doesn’t usually show up as a hard failure. It shows up as higher EGTs, lazy boost response, excess soot, and DPF systems that regen more than they should. OEM 6149 paper filters work fine when they’re new, but once they load with dirt, restriction climbs fast.
That’s why I designed the FA-6149.
This is a high-flow, washable air filter, engineered to maintain airflow over time instead of choking the intake as miles stack up. The synthetic filter media resists collapse and airflow drop-off under sustained load, keeping the turbo operating in its efficiency range and combustion stable.
Sealing matters just as much as airflow. The FA-6149 uses OEM-matched sealing geometry so air goes through the filter — not around it. No bypass means better protection for the turbo, charge-air cooler, and engine internals.
Instead of throwing away paper filters every service interval, you wash the FA-6149, 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 or equipment calls for an OEM 6149-style air filter, the FA-6149 is a direct drop-in replacement with no modifications required.
Replaces OEM & Aftermarket Filters (Table Format)
| Brand / Category | Filter Part Number or Type Replaced |
|---|---|
| OEM | 6149 Air Filters |
| OEM / Aftermarket | 6149-Style Paper Filters |
| Aftermarket | Equivalent 6149-Series Intake Filters |
| Fleet / Fleetguard | 6149 Equivalent Filters |
| Baldwin | 6149 Equivalent Filters |
| Donaldson | 6149 Equivalent Filters |
| Wix / NAPA | 6149 Equivalent Filters |
Note: Replacement compatibility is based on factory 6149 dimensions and sealing geometry. Exact brand part numbers may vary by catalog.
OEM Cross-Reference Table
| OEM / Factory Part # | Application Type | Replaced By |
|---|---|---|
| 6149 | Heavy-Duty Diesel Intake | FA-6149 |
| 6149-Style Paper Filter | Class 6–8 Diesel | FA-6149 |
Features & Benefits
Features
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High-flow washable synthetic filter media
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OEM-matched sealing flange
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Designed for turbocharged diesel airflow
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Reusable, serviceable construction
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Drop-in replacement for 6149-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 replacements
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Long-term savings vs disposable paper filters
Competitor Differentiation
Disposable paper filters are designed to be replaced, not to maintain airflow. As they load with dirt, restriction climbs and performance drops.
I built the FA-6149 to hold airflow steady over time, not just look good when it’s clean. 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.
Made in the USA!
*Price does not include Klotz Oil*
A set of two Fleet Air Filters
Baldwin: RS5288XP
Fleet Guard: AF27948
Luber Finer: LAF6986MXM
Donaldson: P614986
Wix: WA10009
NAPA: 500009
Fits:
Peterbilt:
If your filter number or truck is not listed please call us at 251.654.0892!