Harley Davidson FXST Softail Air & Oil Filter
The Harley Davidson FXST Softail (1987-1990) takes a HF170 oil filter.
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Key takeaways
- Oil filter: HF170 (performance: HF170RC).
- 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 1987-1990.
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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Frequently asked
What oil filter does a Harley Davidson FXST Softail take?
The Harley Davidson FXST Softail takes a HF170 oil filter (or the HF170RC performance version). That part number, or a listed equivalent, is a direct fit.
How often should I change the filters on a Harley Davidson FXST Softail?
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 FXST Softail
We cover the other consumables for your machine too - the exact fit, cited, in one place.