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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KN-171B Harley Davidson/Buell High Performance Oil Filter

Product ID: 253603410

Details

Brand
K&N
Item dimensions L x W x H
10.2 x 7.6 x
Material
Stainless
Product grade
Performance
Vehicle service type
Motorcycle

⚙️Durable stainless steel construction

🏍️Specifically engineered for Harley Davidson/Buell

🛠️Direct OE replacement fit

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12077 Ft

Duties & taxes included

In stock

Sold byAmazon HungaryDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🏍️ Ride Clean, Ride Confident: The Ultimate Oil Filter Upgrade

PRECISION OE FITMENT - Seamlessly replaces your stock oil filter for hassle-free installation
TRUSTED BY THOUSANDS - Rated 4.8/5 by over 13,000 riders who refuse to compromise on quality
TAILORED FOR HARLEY BUELL - Optimized for peak performance on select Harley Davidson and Buell motorcycles
PERFORMANCE GRADE FILTRATION - Keeps your engine running cleaner, longer — because your ride deserves the best
ROBUST STAINLESS STEEL BUILD - Engineered to withstand high-performance demands and extend engine life

The K&N KN-171B is a high-performance oil filter designed as a direct OE replacement for select Harley Davidson and Buell motorcycles. Crafted from durable stainless steel, it offers reliable filtration and fitment, backed by a 4.8-star rating from over 13,000 riders. Engineered to enhance engine longevity and maintain peak performance, this filter is a must-have upgrade for discerning motorcycle enthusiasts.

Specifications

ASIN	B000FGI6E6
Automotive Fit Type	Vehicle Specific Fit
Best Sellers Rank	#14,185 in Automotive ( See Top 100 in Automotive ) #96 in Automotive Replacement Oil Filters
Brand	K&N
Brand Name	K&N
Compatible with Vehicle Type	Motorcycle
Customer Reviews	4.8 out of 5 stars 13,312 Reviews
Global Trade Identification Number	00024844087737
Included Components	OIL FILTER; POWERSPORTS; CANISTER BLACK
Item Dimensions	10.2 x 7.6 x 7.6 centimeters
Item Type Name	OIL FILTER; POWERSPORTS; CANISTER BLACK
Item Weight	0.6 Pounds
Item dimensions L x W x H	10.2 x 7.6 x 7.6 centimeters
Manufacturer	K&N Engineering
Manufacturer Part Number	KN-171B
Material	Stainless Steel
Material Type	Stainless Steel
Model Number	KN-171B
Number of Items	1
OEM Equivalent Part Number	KN-171B
Outside Diameter	2.91 Inches
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
Product grade	Performance Part
Thread Size	3/4 In. 16 UNF
UPC	759173941725 182683047043 024844087737
Unit Count	1 Count
Vehicle service type	Motorcycle

Reviews

B**B

Same as what you can get in a store

23.12.2019

E**S

Tevreden

Correcte en snelle service

22.05.2025

C**E

Bom

Bom mas faltou os adesivos

1.02.2026

S**A

Ajuste perfecto

Perfecta para una Harley Electra Glide

23.02.2026

D**D

Best filter on the market.

20.09.2021

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12077 Ft

Duties & taxes included

In stock

Sold byAmazon HungaryDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Hungary.

Secure transaction

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