This is a new set of 4 standard size (1.940″ intake and 1-3/4″ exhaust) black nitride valves, 2 intake and 2 exhaust, for Harley big twin shovelhead motors from 1966 through 1984. The exhaust valves are also standard size for panhead motors from 1948 through 1965.  Fits all Harley models that use HD part #s 18082-57A and 18074-66.  This generally includes the models shown on the list below.  Consult your parts manual to confirm correct application. These valves came in boxes of 4 of each part # so your order may include the box for the first part # or the box for the other part # but not both boxes.  The box you receive will have 2 of each part #.  If you have any other questions, just let us know.
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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