2004 Harley-Davidson FLHRS Road King Custom Tune-Up Parts
39 parts verified to fit your 2004 Harley-Davidson FLHRS Road King Custom 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 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 02-05 Touring Fuel Injector Replaces H-D 27609-01 3.75 gms/sec Brown Band
$120.82
TwinPower
Twin Power 02-06 Touring 04-17 Dyna EFI Fuel Line Replaces H-D 62349-04F
$62.45
TwinPower
Twin Power 02-07 FLH FLT Fuel Pump Plate Seal Fiber Replaces H-D 61402-02
$15.35
TwinPower
Twin Power 02-07 FLH FLT Models Fuel Pump Plate Seal Viton Replaces H-D 61402-02
$24.56
TwinPower
Twin Power 02-07 FLHT FLHX FLTR 04-07 FLHR 04-07 Softail Fuel Pump Replaces H-D 62897-01B
$184.31
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
Standard Motor Products
Oil Pressure Gauge Switch
$7.74
S&S Cycle
S&S Cycle 99-18 BT/2017+ M8/X-Wedge Black Oil Filter - 12 Pack
$183.95
S&S Cycle
S&S Cycle 99-18 BT/2017+ M8/X-Wedge Chrome Oil Filter - 12 Pack
$288.95
TwinPower
Twin Power Twin Cam and M8 Chrome Magnetic Oil Filter Replaces H-D 63798-99 with Backflow Valve
$16.37
TwinPower
Twin Power Twin Cam and M8 Chrome Magnetic Oil Filter With Nut Rpls H-D 63798-99 w/ Backflow Valve
$17.40
TwinPower
Twin Power Twin Cam and M8 Black Oil Filter Replaces H-D 63731-99A with Backflow Valve
$9.20
Tune-Up for Other Harley-Davidson FLHRS Road King Custom Years
Other Jobs for Your 2004 Harley-Davidson FLHRS Road King Custom
Frequently Asked Questions
What parts do I need for a tune-up on my 2004 Harley-Davidson FLHRS Road King Custom?
A complete tune-up on the 2004 Harley-Davidson FLHRS Road King Custom 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 2004 Harley-Davidson FLHRS Road King Custom?
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 2004 Harley-Davidson FLHRS Road King Custom?
Yes, all parts on this page are verified to fit the 2004 Harley-Davidson FLHRS Road King Custom 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 2004 Harley-Davidson FLHRS Road King Custom?
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 2004 Harley-Davidson FLHRS Road King Custom?
The cost of a tune-up for the 2004 Harley-Davidson FLHRS Road King Custom 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.