Harley Davidson FLSTF Fat Boy Air & Oil Filter
The Harley Davidson FLSTF Fat Boy (1989-2017) takes a HF171 oil filter.
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Key takeaways
- Oil filter: HF171 (performance: HF171RC).
- Air filter: not separately listed (may be a non-serviceable element).
- Change the oil filter at every oil change; check the air filter each service.
- Covers 1989-2017 (filter changed across years - see table).
Air Filter-
Verified fitLast checked
Sources: Hiflofiltro application catalogue
Reviewed by the CrankDex editorial team against manufacturer and retailer fitment data.
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Harley Davidson FLSTF Fat Boy filters by year
| Years | Oil filter | Air filter |
|---|---|---|
| 2000-2017 | HF171 | - |
| 1989-1999 | HF170 | - |
Frequently asked
What oil filter does a Harley Davidson FLSTF Fat Boy take?
The Harley Davidson FLSTF Fat Boy takes a HF171 oil filter (or the HF171RC performance version) on recent years; see the by-year table for earlier models. That part number, or a listed equivalent, is a direct fit.
How often should I change the filters on a Harley Davidson FLSTF Fat Boy?
Change the oil filter at every oil change, and inspect the air filter at each service - replace it when dirty, sooner if you ride in dust or off-road. Always follow your owner's manual interval.
More parts for your Harley Davidson FLSTF Fat Boy
We cover the other consumables for your machine too - the exact fit, cited, in one place.