2 NITRIDED EXHAUST VALVES 1948-84 HARLEY PANHEAD & SHOVELHEAD 18082-57A 18086-80

Description

This is a brand new set of TWO (2) standard size 1-3/4" diameter black nitride exhaust valves for Harley big twin panhead and shovelhead motors from 1948 through 1984.  Fits all
Harley models that use HD part #s 18082-57A or  18086-80.
These valves are marked with the later 18086-80 part number because they are the later style nitrided valves rather than plain steel valves.
1980 is when Harley started spec-ing out nitrited valves from their suppliers to handle the unleaded fuel that came on the market and was causing galling problems on standard steel valves.
Some of the models that may use these valves are shown on the list below but consult your parts manual to confirm correct application by part # before purchase.  If you have any other questions, just let us know.
This is the best buy it now delivered price on these parts on eBay.   Add this listing to your watch list and check around to confirm.  Thank you!
Tech note on black nitride valves
- Black nitride is a hardening treatment that increases the surface hardness of the valve yet it keeps good ductility beneath the hard nitrided layer, unlike stainless valves which are more brittle throughout. A
black nitride
surface finish is also smoother than chromed valve stems resulting in less friction between the valve stem and the guide which reduces galling.  It also makes the valve last longer with lead-free fuels and fuels that contain alcohol.  The black nitrided layer is adhered to a valve's base material at a microscopic level, so it can not flake or brake off. The black nitride coating is applied to the whole valve while traditional chrome coating is only applied to the stem.
1979 - 1980
Harley-Davidson
1200 Fat Bob - FXEF
1977 - 1979
Harley-Davidson
1200 Low Rider - FXS
1971 - 1978
Harley-Davidson
1200 Super Glide - FX
1973 - 1980
Harley-Davidson
1200 Super Glide - FXE
1978 - 1984
Harley-Davidson
80 Electra Glide - FLH
1981
Harley-Davidson
80 Electra Glide Heritage - FLH
1979 - 1981
Harley-Davidson
80 Fat Bob - FXEF
1979 - 1982
Harley-Davidson
80 Low Rider - FXS
1983 - 1984
Harley-Davidson
80 Low Rider - FXSB
1980 - 1982
Harley-Davidson
80 Sturgis - FXB
1979 - 1984
Harley-Davidson
80 Super Glide - FXE
1980 - 1984
Harley-Davidson
80 Wide Glide - FXWG
1983
Harley-Davidson
Disc Glide - FXDG
1966 - 1980
Harley-Davidson
Electra Glide - FL
1966 - 1984
Harley-Davidson
Electra Glide - FLH
1977
Harley-Davidson
Electra Glide - FLHS
1980 - 1981
Harley-Davidson
Electra Glide - FLHS
1983
Harley-Davidson
Electra Glide - FLHT
1977 - 1981
Harley-Davidson
Electra Glide Classic - FLH 1200
1979 - 1984
Harley-Davidson
Electra Glide Classic - FLH 80
1983
Harley-Davidson
Electra Glide Classic - FLHTC
1984
Harley-Davidson
Electra Glide Special - FLHX
1982 - 1984
Harley-Davidson
Electra Glide Sport - FLHS
1983
Harley-Davidson
Sport Glide - FXRT
1982 - 1983
Harley-Davidson
Super Glide II - FXR
1982 - 1983
Harley-Davidson
Super Glide II - FXRS
1980 - 1983
Harley-Davidson
Tour Glide - FLT
1980 - 1983
Harley-Davidson
Tour Glide Classic - FLTC