Your Harley’s V-twin runs hot, runs hard, and pumps a serious volume of oil through a single spin-on filter. Pick the wrong one and you risk poor cold-start flow, bypass valve trouble, or a filter that strips its threads when you try to remove it. A good filter protects the cam bearings, the lifters, and the crank, which are exactly the parts you do not want to gamble on. We looked at filtration efficiency, anti-drainback design, can strength, and how easy each one is to grip and remove with oily hands.
Below are seven oil filters that genuinely fit common Harley platforms including Twin Cam, Milwaukee-Eight, and Evolution and Sportster engines. We focused on real-world performance instead of marketing claims, and we called out the honest weakness of every single option so you know exactly what you are buying before you reach for the wrench.
| Photo | Product | Score | Buy |
|---|---|---|---|
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Harley-Davidson 63731-99A Genuine Oil Filter (Black) Best Overall OEM spin-on, fits Twin Cam, Milwaukee-Eight, Evolution Big Twin and most Sportster models |
9.5 | 🛒 Check Price |
 |
K&N KN-171B Performance Oil Filter (Black) Best Easy Removal Spin-on with 17mm welded nut, high-flow media, fits most Twin Cam, M8 and Sportster engines |
9.3 | 🛒 Check Price |
 |
HIFLOFILTRO HF170B Premium Oil Filter (Black) Best Value TUV-approved spin-on, anti-drainback valve, fits Evolution, Twin Cam and Sportster engines |
9.1 | 🛒 Check Price |
 |
WIX 57899 Spin-On Oil Filter Best Filtration Spin-on with reinforced media, silicone anti-drainback valve, fits many Twin Cam and Sportster models |
8.9 | 🛒 Check Price |
 |
K&N KN-171C Performance Oil Filter (Chrome) Best Looking Chrome spin-on with 17mm welded nut, high-flow media, fits most Big Twin and Sportster engines |
8.7 | 🛒 Check Price |
 |
EMGO 10-82240 Spin-On Oil Filter (Chrome) Best Budget Chrome Chrome spin-on with anti-drainback valve, fits Evolution, Twin Cam and Sportster models |
8.4 | 🛒 Check Price |
 |
Twin Air 140013 Oil Filter Best for Hard Riders Spin-on with reinforced can and high dirt capacity, fits select Twin Cam and Sportster engines |
8.2 | 🛒 Check Price |
1. Harley-Davidson 63731-99A Genuine Oil Filter (Black): Best Overall
When the engine is genuinely worth protecting, the part the factory designed for it is hard to argue with. The Harley-Davidson 63731-99A is the OEM black filter that ships on a huge range of Big Twin and Sportster machines, and that is exactly why it earns our top spot. The media, the bypass pressure, and the anti-drainback valve are all calibrated to the oil pump and galleries of a Harley V-twin, so you are not guessing whether an aftermarket bypass spring opens too early or too late. On cold morning starts the drainback valve does its job and you hear the lifters quiet down fast, which is the single best sign a filter is feeding oil where it should.
The honest weakness is removal. This is a smooth, painted can with no welded hex nut on the end, so if a previous owner cranked it on dry you will be fighting it with a cap or strap wrench, and the paint can scuff. It is also a plain filter with no flashy features, so riders who want a wrench-friendly nut or a chrome look will need to step to one of the options below. For pure protection and confidence on the road on the engine itself, though, this is the one we keep buying.
- Factory-engineered media matched to Harley oil pressure and flow
- Integrated anti-drainback valve keeps oil at the pump on cold starts
- Black painted can matches stock and aftermarket black engine cases
Pros: Guaranteed correct fit and bypass calibration for your model; Strong base plate and gasket that seals reliably under heat cycling; Keeps warranty and service records simple with the genuine part
Cons: Smooth can has no hex nut, so removal needs a filter wrench; Availability can vary by model year, so confirm your fitment first
2. K&N KN-171B Performance Oil Filter (Black): Best Easy Removal
If you have ever rounded off a filter trying to break it loose, the K&N KN-171B will feel like a gift. The welded 17mm nut on the end means you grab a wrench or socket, crack it loose in one clean motion, and spin it off without a strap wrench slipping in oil. That single feature makes oil changes faster and a lot less frustrating, and it is why this is our pick for the rider who does the work themselves. The can itself is thick-walled and built for the vibration and pressure a V-twin throws at it, and the high-flow media is a sensible match for spirited street riding.
The trade-off is value and looks. You pay a premium over a basic filter, and while the filtration is excellent, the everyday rider doing relaxed miles may not extract the full benefit of the high-flow design. It also comes in black only, so a builder chasing a mirror-finish drivetrain will be disappointed. For most owners who change their own oil, though, the welded nut alone justifies the upgrade.
- Welded 17mm hex nut lets you remove it with a standard wrench or socket
- Heavy-gauge canister rated for high oil pressure and vibration
- High-flow synthetic blend media designed for performance riding
Pros: The nut on the end makes removal genuinely tool-friendly and clean; Strong can resists denting and handles aggressive riding heat; Wide Harley fitment across modern Big Twin and Sportster platforms
Cons: Costs more than a plain filter for the same core job; Black finish only, so it will not match a full chrome build
3. HIFLOFILTRO HF170B Premium Oil Filter (Black): Best Value
HIFLOFILTRO has a strong reputation in the powersports world, and the HF170B brings that to Harley owners who want certified quality without paying boutique money. This is our value pick because the media is TUV and ISO evaluated, the anti-drainback and relief valves are present and working, and the build quality of the can punches well above what you expect. In practice it seals cleanly, holds pressure, and gives you the quiet cold start that tells you the drainback valve is doing its job. For a rider who changes oil on schedule and just wants a proven, no-drama filter, this delivers.
The catch is that the HF170B is a smooth can with no hex nut, so removal means a cap or strap wrench, the same chore as the OEM filter. Fitment also leans heavily toward Evolution, Twin Cam, and Sportster applications, so Milwaukee-Eight owners should double-check the cross-reference before buying. None of that hurts the actual filtration, which is the whole point, and that is why it remains an easy recommendation.
- TUV and ISO evaluated media for consistent, verified filtration
- Built-in anti-drainback and pressure relief valves
- Black coated steel can with a clean, OEM-style appearance
Pros: Strong filtration quality relative to what you pay; Independent lab certification backs up the performance claims; Reliable sealing gasket that comes pre-lubricated in many packs
Cons: Smooth can with no removal nut, so a wrench is needed to take it off; Fitment skews to older Evo and Twin Cam, so verify Milwaukee-Eight use
4. WIX 57899 Spin-On Oil Filter: Best Filtration
WIX is a name engine builders trust, and the 57899 brings serious filtration credentials to the Harley world through cross-reference. We rate it our best filtration pick because the media is densely pleated for high dirt-holding capacity, and the anti-drainback valve is silicone rather than ordinary rubber, which means it stays flexible and keeps sealing properly after many heat cycles. The metal end caps and coil-spring support give it the structure to handle a V-twin’s pressure spikes without collapsing, and the result is a filter that quietly does the protective work without any fuss.
The thing to watch is that this is an automotive-heritage filter, not a Harley-stamped part, so you must confirm the 57899 cross-references correctly to your specific model before you order. It is also a smooth can, so removal is the usual wrench job with no convenient nut. If you prioritize raw filtration and valve longevity over branding and a removal nut, the WIX earns its place on this list.
- Tightly pleated media for strong dirt-holding capacity
- Silicone anti-drainback valve that stays flexible over many cycles
- Coil-spring support and metal end caps for durability under pressure
Pros: Excellent particle capture and high contaminant capacity; Silicone drainback valve outlasts the cheaper rubber type; Trusted automotive-grade engineering and consistent quality control
Cons: Not Harley-branded, so confirm the exact cross-reference for your bike; Plain can with no nut means standard wrench removal
5. K&N KN-171C Performance Oil Filter (Chrome): Best Looking
For the rider building a show-quality engine, function alone is not enough, and that is where the chrome K&N KN-171C comes in. Under the shiny can it is the same high-flow media and welded 17mm removal nut as the black KN-171B, so you get the easy wrench removal and the solid build, dressed up to match a polished or chrome drivetrain. On a bagger or custom where every visible part is detailed, a plain black filter looks out of place, and this solves that without compromising the filtration.
The honest weakness is the chrome itself. It picks up fingerprints and oil smears the moment you touch it, and over many hot miles the finish near the base plate can discolor from engine heat, so it never stays quite as flawless as day one. You are also paying a premium over the black version for what is, mechanically, the identical filter. If looks matter to your build, it is worth it, but for a daily rider who never sees the filter, the black model makes more sense.
- Mirror chrome can for show bikes and polished drivetrains
- Welded 17mm nut for quick, clean wrench removal
- Same high-flow K&N media as the black KN-171B
Pros: Looks excellent on a chrome or polished engine build; Removal nut makes oil changes fast and mess-free; Strong canister and proven high-flow filtration
Cons: Chrome shows fingerprints, oil smears and heat discoloration over time; Premium price for what is functionally the same filter as the black version
6. EMGO 10-82240 Spin-On Oil Filter (Chrome): Best Budget Chrome
EMGO has long been the go-to for riders who want the chrome look without the premium outlay, and the 10-82240 is a sensible everyday choice for older Harleys. It carries a working anti-drainback valve for clean cold starts and provides perfectly adequate filtration for normal street riding, all wrapped in a chrome can that brightens up an Evo or Twin Cam engine. For a rider who wants the shine but does relaxed, regular-interval oil changes, this gets the job done without overthinking it.
Where it gives ground is in the details. The chrome plating is not as deep or as durable as the K&N, and the canister, while fine for street use, does not feel as heavy-gauge as the premium cans when you handle it side by side. There is also no removal nut, so you are back to a wrench at change time. Treat it as a budget-friendly chrome filter for a touring or commuter Harley rather than a high-performance part, and it represents fair value.
- Chrome finish at a much more accessible position than premium brands
- Anti-drainback valve for clean cold starts
- Broad Harley fitment across Evo, Twin Cam and Sportster engines
Pros: Affordable way to get a chrome look on the engine; Solid everyday filtration for normal street riding; Wide availability and easy cross-reference for older Harleys
Cons: Chrome quality and can strength trail the premium options; No removal nut, so you still need a wrench to take it off
7. Twin Air 140013 Oil Filter: Best for Hard Riders
Twin Air built its name in off-road and racing filtration, and the 140013 brings that hard-use mindset to riders who lean on their Harley. We picked it for the rider who runs long, hot, loaded miles or pushes the engine harder than average, because the reinforced can and high dirt-holding media are designed to keep filtering reliably when conditions get demanding. The anti-drainback valve handles startup pressure properly, and the overall feel is of a filter built to take abuse rather than just tick a maintenance box.
The real limitation is fitment and availability. Twin Air’s Harley coverage is narrower than the mainstream brands, so you must verify the 140013 fits your exact engine before ordering, and it is simply harder to find in stock than an OEM or K&N filter. For most relaxed street riders it is more filter than needed, but if you ride hard and value a tough, high-capacity can, it is a credible specialist choice that rounds out this list.
- Reinforced construction aimed at demanding, high-load use
- High contaminant-holding media for extended hard miles
- Anti-drainback valve to maintain pressure at startup
Pros: Built tough for riders who push the engine hard; Good dirt capacity between changes under heavy use; Reputable filtration brand with a powersports racing background
Cons: Narrower Harley fitment, so confirm your model carefully; Less common on shelves, so availability can be inconsistent
Frequently Asked Questions
Which oil filter fits my Harley Twin Cam, Milwaukee-Eight or Sportster?
Most modern Harley Big Twins, including Twin Cam and Milwaukee-Eight, along with Evolution engines and many Sportster models, use the same common spin-on filter family that the OEM 63731-99A and K&N KN-171 series cover. That said, you should never assume. Check your exact year and model against the filter’s cross-reference chart before buying, because a handful of years and the Milwaukee-Eight in particular can have specific requirements. When in doubt, match the part number to your service manual or confirm the cross-reference listed on the product page.
Are OEM Harley oil filters really better than aftermarket ones?
The genuine Harley filter has the advantage of being calibrated exactly to your engine’s oil pressure, bypass behavior, and flow, which removes any guesswork. However, several aftermarket filters such as the K&N KN-171B, HIFLOFILTRO HF170B, and WIX 57899 are engineered to meet or exceed those same standards and are independently evaluated. The honest answer is that a quality aftermarket filter from a reputable brand protects your engine just as well. The OEM part is the safest default, while a good aftermarket filter can add features like a removal nut or higher dirt capacity.
How often should I change the oil filter on a Harley Davidson?
The standard practice is to replace the oil filter every time you change the oil, which for most Harley riders falls around every 2,500 to 5,000 miles depending on your model, riding style, and the oil you use. Always check your owner’s manual for the exact interval for your bike. Changing the filter with every oil change is cheap insurance, because a clogged or bypassing filter sends unfiltered, contaminated oil straight through your engine. Riders who do long, hot, or dusty miles should lean toward the shorter end of that range.
What does the anti-drainback valve in an oil filter actually do?
The anti-drainback valve keeps oil from draining out of the filter and back into the sump when the engine is switched off. That matters because on a cold start you want oil pressure to build instantly rather than waiting for the pump to refill an empty filter, which causes those few seconds of dry running that wear engines over time. Every filter we recommend has a working anti-drainback valve, and the WIX 57899 uses a silicone version that stays flexible and keeps sealing longer than ordinary rubber across many heat cycles.
Do I need a special tool to remove a Harley oil filter?
For smooth-can filters like the OEM 63731-99A, the HIFLOFILTRO, the WIX, and the EMGO, you will want a cap-style or strap filter wrench to break them loose, especially if the previous filter was over-tightened. The big convenience upgrade is a filter with a welded nut on the end, such as the K&N KN-171B and chrome KN-171C, which lets you remove it with a standard wrench or socket and no slipping. Whatever you use, only hand-tighten the new filter about three-quarters of a turn past gasket contact so the next change is not a battle.
Our Verdict
For pure engine protection and guaranteed fitment, the genuine Harley-Davidson 63731-99A is our top pick, since its media and bypass valving are calibrated to your V-twin and it simply works without surprises. If you change your own oil and want the job to be faster and cleaner, the K&N KN-171B is the runner up thanks to its welded 17mm removal nut and high-flow media. Choose the OEM filter for maximum confidence on the road, step to the K&N for convenience and performance, and pick from the chrome and value options based on your build and how hard you ride.
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