2003 Harley-Davidson FLSTF Fat Boy Tune-Up Parts
55 parts verified to fit your 2003 Harley-Davidson FLSTF Fat Boy for a complete tune-up. This is an easy DIY project — estimated 1-2 hours.
Air Filters
(8)primary
aFe
aFe Aries Powersport Air Filters OER P5R A/F Pro Dry S MC - Harley-Davidson XL/Dyna 99-21
$76.00
K&N
K&N Replacement Air Filter 1.625in H for Harley Davidson
$68.99
Performance Machine
Performance Machine Vision Air Cleaner W/Bezel - Black Ops
$664.95
Performance Machine
Performance Machine Air Cleaner Max HP - Black Ops
$598.95
Performance Machine
Performance Machine Air Cleaner Max HP - Chrome
$598.95
Performance Machine
Performance Machine Air Cleaner Max HP - Contrast Cut
$598.95
Performance Machine
Performance Machine Air Cleaner Slim - Black Ano
$505.20
Performance Machine
Performance Machine Air Cleaner Slim - Chrome
$506.21
Fuel Injectors
(8)companion
Bikers Choice
Bikers Choice Chrome OEM Style Horn Cover
$57.33
TwinPower
Twin Power 00-03 FLHR 02-03 FLS Fuel Pump Replaces H-D 61432-00, 61744-00 61744-00A 62897-01
$184.31
TwinPower
Twin Power 01-05 Softail Dyna Fuel Injector Replaces H-D 27609-01B 08-16 Touring 4.3 g/s White Band
$120.82
TwinPower
Twin Power 01-17 Softail Models 02-07 FLH FLHT Fuel Pump Plate Screw Kit Replaces H-D 1311D
$12.28
TwinPower
Twin Power 02-17 Softail Models Fuel Pump Plate Seal Fiber Replaces H-D 61381-02
$10.23
TwinPower
Twin Power 02-17 Softail Models Fuel Pump Plate Seal Viton Replaces H-D 61381-02
$25.59
TwinPower
Twin Power 07 FLH FLT 01-17 FXST FLST EFI Fuel Line Replaces H-D 62900-01
$55.28
Bikers Choice
Bikers Choice 00-Up Softail Gas Tank Mount Grommet Set Replaces H-D 62881-00 (Pair)
$4.08
Fluids & Additives
(8)consumable
K&N
K&N Harley-Davidson / Buell 3in OD x 4.063in H Black Oil Filter
$17.99
K&N
K&N Harley-Davidson / Buell 3in OD x 4.063in H Chrome Oil Filter
$19.99
LIQUI MOLY
LIQUI MOLY 1L Motorbike 4T SAE 20W50 Street
$63.23
LIQUI MOLY
LIQUI MOLY 1L Motorbike 4T Synth SAE 10W60 Offroad Race
$101.41
LIQUI MOLY
LIQUI MOLY 1L Motorbike 4T Synth SAE 10W60 Street Race
$96.35
LIQUI MOLY
LIQUI MOLY 1L Motorbike Fork Oil SAE 15W Heavy
$98.87
LIQUI MOLY
LIQUI MOLY 1L Motorbike HD Synth SAE 20W50 Street
$97.41
LIQUI MOLY
LIQUI MOLY 20L Motorbike 4T SAE 20W50 Street
$160.59
Tune-Up for Other Harley-Davidson FLSTF Fat Boy Years
Other Jobs for Your 2003 Harley-Davidson FLSTF Fat Boy
Frequently Asked Questions
What parts do I need for a tune-up on my 2003 Harley-Davidson FLSTF Fat Boy?
A complete tune-up on the 2003 Harley-Davidson FLSTF Fat Boy typically requires air filters, fuel injectors, fluids & additives. All parts shown on this page are verified to fit your specific vehicle.
How long does a tune-up take on a 2003 Harley-Davidson FLSTF Fat Boy?
A tune-up typically takes 1-2 hours and is rated as easy difficulty. Actual time may vary depending on your experience and the specific parts being replaced.
Can I do a tune-up myself?
Yes! A tune-up is an easy DIY project that most people can do with basic hand tools. It's a great way to save money on labor costs.
Are these parts guaranteed to fit my 2003 Harley-Davidson FLSTF Fat Boy?
Yes, all parts on this page are verified to fit the 2003 Harley-Davidson FLSTF Fat Boy using VCDB fitment data from manufacturers. Our fitment information is cross-referenced with industry-standard vehicle databases to ensure accuracy.
What brands make tune-up parts for the 2003 Harley-Davidson FLSTF Fat Boy?
We carry tune-up parts from trusted brands including aFe, K&N, Performance Machine, Bikers Choice, and TwinPower. Filter by brand to find your preferred manufacturer.
How much does a tune-up cost for a 2003 Harley-Davidson FLSTF Fat Boy?
The cost of a tune-up for the 2003 Harley-Davidson FLSTF Fat Boy depends on the parts and brands you choose. Browse the parts on this page to see current pricing. Doing the work yourself saves significantly on labor costs.