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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K&N Motorcycle Oil Filter: High Performance, Premium, Designed to be used with Synthetic or Conventional Oils: Fits Select Harely Davidson Motorcycles, KN-171B

K&N Motorcycle Oil Filter: High Performance, Premium, Designed to be used with Synthetic or Conventional Oils: Fits Select Harely Davidson Motorcycles, KN-171B

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

🔧Wrench-Off design for quick, hassle-free removal

⚙️High flow rate for peak engine performance

🛡️Pleated synthetic-blend media traps harmful contaminants

154.22 DT

Duties & taxes included

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Sold byAmazon TunisiaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🛵 Ride Clean, Ride Confident: The Ultimate Oil Filter for Your Harley

HEAVY DUTY DURABILITY - Built with a robust stainless steel canister to withstand the toughest rides and longer service intervals.
EFFORTLESS MAINTENANCE - Fast Wrench-Off removal means less downtime and more time on the road—because your ride waits for no one.
UNIVERSAL OIL COMPATIBILITY - Optimized for synthetic, conventional, and blended oils—flexibility that fits your maintenance style.
UNMATCHED OIL FLOW EFFICIENCY - Keeps your Harley’s engine running smoother and stronger with superior oil circulation.
PRECISION FILTRATION TECHNOLOGY - Advanced pleated synthetic-blend media captures maximum contaminants, protecting your engine’s longevity.

The K&N KN-171B Motorcycle Oil Filter is engineered for select Harley Davidson models, delivering high oil flow rates and premium filtration with pleated synthetic-blend media. Its heavy-duty stainless steel canister ensures durability under demanding conditions, compatible with synthetic and conventional oils. Laboratory tested for burst strength and capacity, it features a user-friendly Wrench-Off design for quick installation and removal, backed by a 1-year limited warranty.

Specifications

ASIN	B000FGI6E6
Automotive Fit Type	Vehicle Specific Fit
Brand	K&N
Brand Name	K&N
Compatible with Vehicle Type	Motorcycle
Customer Reviews	4.8 out of 5 stars 13,510 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	272 g
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

Used for my 2011 HD Fat Boy Soft Tail.

23.12.2019

E**S

Tevreden

Correcte en snelle service

22.05.2025

M**I

PERFETTO TUTTO

Perfetto

17.04.2026

C**E

Bom

Bom mas faltou os adesivos

1.02.2026

S**A

Ajuste perfecto

Perfecta para una Harley Electra Glide

23.02.2026

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154.22 DT

Duties & taxes included

In stock

Sold byAmazon TunisiaDelivered 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 Tunisia.

Secure transaction

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