Amazon needs to fix the fact that this filter does in fact, fit a 2018 harley davidson fat bob fxfb... cuz i use it all the time.

You can go the K&N webpage (link below) for this particular filter. There is a fitment guide there. According to that website this will fit a 2010 Fat Bob and several others.

does this filter a kn171b replace a 63798-99A

The 63798-99A would cross-reference to the K&N KN-171B Oil Filter.

Can I use this filter on my 2019 fatboy 107?

Not sure. A 2002 Lexus 300 SUV is the same filter as this I do know.

Will this work on a2016 wide glide 103 engine

This fit the 103 Harley Twin I have. Ultimately, put your make and model into your garage in Amazon and it will let you know if it applies. I suspect it will fit all 103 engines.

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Motorcycle Oil Filter: High Performance, KN-171B | Designed to be used with Synthetic or Conventional Oils, Wrench Off Nut: Fits Select Harley Davidson Motorcycles

Product ID: 3981525

Details

Brand
K&N
Item dimensions L x W x H
4 x 3 x 3
Material
(Filter Media)
Product Grade
Performance
Vehicle Service Type
Motorcycle

🔧Wrench-off nut for effortless removal

⚙️High flow rate for max engine efficiency

🛡️Synthetic-blend media traps harmful contaminants

B/.54

Duties & taxes included

In stock

Sold byAmazon PanamaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🛵 Ride Clean, Ride Confident: The Ultimate Harley Oil Filter Upgrade

OPTIMIZED OIL FLOW - Engineered for exceptional flow rates, ensuring peak performance under all riding conditions.
DURABLE HEAVY DUTY CANISTER - Built tough with steel/aluminum housing to withstand long service intervals and harsh rides.
UNMATCHED ENGINE PROTECTION - Pleated synthetic-blend filtration removes 99%+ contaminants to keep your Harley running pristine.
VERSATILE OIL COMPATIBILITY - Seamlessly works with synthetic, conventional, and blended oils — no compromises.
QUICK RELEASE WRENCH OFF NUT - 17mm welded hex nut lets you swap filters fast — because your time is valuable.

The K&N KN-171B Motorcycle Oil Filter is a high-performance, vehicle-specific filter designed for select Harley Davidson models. Featuring a synthetic-blend filtration media, it delivers superior contaminant removal and supports synthetic, conventional, and blended oils. Its heavy-duty steel/aluminum canister and wrench-off nut enable durability and quick maintenance. Laboratory tested for flow rate and burst strength, it meets extended service intervals and comes backed by a 1-year limited warranty.

Specifications

ASIN	B000FGI6E6
Automotive Fit Type	Vehicle Specific Fit
Best Sellers Rank	#1,709 in Automotive ( See Top 100 in Automotive ) #2 in Powersports Oil Filters
Brand Name	K&N
Compatible with Vehicle Type	Motorcycle
Customer Reviews	4.8 4.8 out of 5 stars (6,355)
Global Trade Identification Number	00024844087737
Included Components	OIL FILTER; POWERSPORTS; CANISTER BLACK
Item Dimensions	4 x 3 x 3 inches
Item Type Name	OIL FILTER; POWERSPORTS; CANISTER BLACK
Item Weight	9.6 ounces
Manufacturer	K&N Engineering
Manufacturer Part Number	KN-171B
Manufacturer Warranty Description	LIMITED WARRANTY
Material Type	Synthetic-Blend (Filter Media), Steel/Aluminum (Housing)
Model Number	KN-171B
Number of Items	1
Number of Packs	1
OEM Equivalent Part Number	KN-171B
Outside Diameter	2.91 inches
Part Interchange Info	Fits Select Harley Davidson Motorcycles: Compatible with the listed Harley Davidson motorcycle models. No information provided about compatibility with other makes or models.
Product Grade	Performance Part
Thread Size	M17 x 1.5
UPC	759173941725 182683047043 024844087737
Unit Count	1 Count

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