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K&N O.E.M. Replacement FilterO.E.M. Replacement Air Filter

K&N Replacement Air Filters are designed to fit right into the standard OEM airbox. No modifications are required by the owner, no jet changes or adjustment of the carburetors is anticipated or suggested. Customer modification of the standard airbox - removing the cover, drilling holes into the side or top will have a drastic effect on smooth carburetion. Modifications will cause the stock system to run lean and reduce horsepower. Keep your motorcycle stock and the new K&N Replacement Element will be good for the life of the engine.

ApplicationYearK&N No.Order No.
XLH Sportster86-87HD-2085005-383
Sportster67-74HD-0200005-377
FL, FLH67-75HD-0200005-377
FX, FXE (74ci)67-75HD-0200005-377
FX, FXE, FXS76-78.5HD-2076005-380
Sportster88-00HD-1388005-378
FL75.5-83HD-2078005-381
86-89HD-2076005-384
90-95HD-1390005-379
FXS Low Rider78.5-83HD-2078005-381
FX86-89HD-2086005-384
90-99HD-1390005-379
ApplicationYearK&N No.Order No.
FXRT/FXST84-85HD-2084005-382
FXST Softail00HD-1499005-675
FXRDG/FXRS84HD-2084005-382
FLHR80HD-1499005-675
FLHRI96-98HD-1395005-674
FLHTCUI99-00HD-8899005-676
FLTR99-00HD-1499005-675
FLTRI99HD-8899005-676
FXD/FXDL99HD-1499005-675




Custom Air Filter

ApplicationCarbFlange
Dimension		 Filter
Dimension		K&N No.Order No.
Sportster / Big TwinVM,TM 38,39,41 2-7/16" / StraightRound / 2"RC-0850 005-100
VM 40-442-3/4" / StraightRound / 2" RC-0920005-101
HS 402-1/8" / OffsetRound / TaperedN/A 007-216
Chrome bonnet for above filterN/A007-215
XR 750/1000VM,TM 38,41 2-7/16" / 10 degreeOval / 7"RU-1240005-175
2-7/16" / 20 degreeOval / 5"RU-1370005-332



Sportster 1200cc
DescriptionK&N No.Order No.
TeardropMirrorRK-3904005-604
Ball GroovedRK-3914005-608
FlamedRK-3903005-677
Perfect RoundMirrorRK-3903005-603
Ball GroovedRK-3913005-607
FlamedRK-3923005-678
Big Twin 1340cc
DescriptionK&N No.Order No.
TeardropMirrorRK-3902005-602
Ball GroovedRK-3912005-606
FlamedRK-3922005-679
Perfect RoundMirrorRK-3901005-601
Ball GroovedRK-3911005-605
FlamedRK-3921005-680
They fit all "EVO" model Big Twin and Sportsters with stock carburetors. Each K&N cleaner comes complete and ready to use, including mounting bracket kit.





Mikuni Carburetors
36-38 (2-7/16" mounting flange)
DescriptionK&N No.Order No.
5" Diameter Open RoundRC-0850005-100
6" Diameter Chrome BonnetML-085B005-681
Replacement elementML-0850005-682
4-1/2"x 7" Open Oval StyleRC-1980005-683
40-45mm (2-3/4" mounting flange)
DescriptionK&N No.Order No.
5" Diameter Open RoundRC-0920005-101
6" Diameter Chrome BonnetML-092B005-684
Replacement elementML-0920005-685
4-1/2"x 7" Open Oval StyleRC-2000005-686
These air cleaners clamp directly to the carburetor flange.





Keihin and S&S Carburetors
1976-up
DescriptionK&N No.Order No.
5" Diameter Open RoundRC-3201005-691
6" Diameter Chrome BonnetRK-320B005-692
Replacement elementE-3200005-693
These air cleaners were designed to bolt-on directly to the Keihin or S&S carbus.
Custom Replacement Filter

























Dirt Track Air Cleaners for Mikuni 36-38mm Carburetors
StyleLenghtFlangeK&N No.Order No.
Oval6"10° angle x 1"RU-1230005-687
Oval7"10° angle x 1"RU-1240005-175
Oval9"10° angle x 1"RU-1260005-688
"D" Oval7"10° angle x 2-1/8"RU-1830005-689
"D" Oval9"10° angle x 2-1/8""RU-1840005-690
These dirt track air cleaners are large by design to allow extra dirt holding capacity without restricting air flow. The "D" shaped oval, with the long neck, permits clamping onto the velocity stak in such a manner as not to obstruct the air flow to the velocity stack. To extend the service life, add one of our pre-charger filter wraps.






Keihin FLOWMASTER Carburetors
(2-5/8" mounting flange)
DescriptionK&N No.Order No.
5" Diameter Open RoundRK-3800005-694
6" Diameter Chrome BonnetRK-380B005-695
Replacement element for RK-3800, and RK-380BRK-380E005-696
These air cleaners clamp directly to the carburetor flange.