BLACK DIAMOND INTAKE VALVE HD EVOLUTION 87-99
In stock · stock as of Sep 16, 2026
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Details
All KPMI Black Diamond® stainless steel valves are impregnated by a special German process to a depth of .002”, with a surface build up of .0002”. This “Black Diamond®” process improves wear properties, reduces friction, and provides resistance to corrosion and wear that is superior to chrome and nickel electrolysis plating. Black Diamond® Valves are light, strong, one-piece forgings with profiles that provide excellent flow characteristics.
Specs
- Vehicle
- Motorcycle
- Weight Lb
- 0.23
- Shipping Class
- standard
Vehicle Fitment
Check KPMI BLACK DIAMOND INTAKE VALVE HD EVOLUTION 87-99 (part 20-4171) against your vehicle before ordering.
Supplier-confirmed applications for this exact part. Match the year, make, and model below. A listed application is not confirmation for an unlisted vehicle.
Harley Davidson FLH Electra Glide
1984–1985
Harley Davidson FLHR Road King
1994–1998
Harley Davidson FLHRC Road King Classic
1998
Harley Davidson FLHS Electra Glide Sport
1984, 1987–1993
Harley Davidson FLHT Electra Glide
1986–1987, 1995–1998
Harley Davidson FLHTC Electra Glide Classic
1984–1998
Harley Davidson FLHTCU Electra Glide Ultra Classic
1989–1998
Harley Davidson FLHX Electra Glide Special
1984–1985
Harley Davidson FLST Softail Heritage
1986–1990
Harley Davidson FLSTC Softail Heritage Classic
1988–1999
Harley Davidson FLSTF Softail Fat Boy
1990–1999
Harley Davidson FLSTN Softail Heritage Special
1996
Harley Davidson FLSTN Softail Nostalgia
1993–1995
Harley Davidson FLSTS Softail Heritage Springer
1997–1999
Harley Davidson FLTC Tour Glide Classic
1984–1993
Harley Davidson FLTCU Ultra Classic Tour Glide
1989–1996
Harley Davidson FLTR Road Glide
1998
Harley Davidson FXD Dyna Super Glide
1995–1998
Harley Davidson FXDB-D Dyna Glide Daytona
1992
Harley Davidson FXDB-S Dyna Glide Sturgis
1991
Harley Davidson FXDC Dyna Super Glide Custom
1992
Harley Davidson FXDL Dyna Low Rider
1993–1998
Harley Davidson FXDS-Conv Dyna Convertible
1994–1998
Harley Davidson FXDWG Dyna Wide Glide
1993–1998
Show 20 more model applications
Harley Davidson FXE Super Glide
1984
Harley Davidson FXEF Fat Bob
1985
Harley Davidson FXLR Low Rider Custom
1987–1994
Harley Davidson FXR Super Glide
1986–1994
Harley Davidson FXRC Low Glide
1985
Harley Davidson FXRC Low Rider Chrome
1987
Harley Davidson FXRD Grand Touring
1986
Harley Davidson FXRDG Disc Glide
1984
Harley Davidson FXRS Low Glide
1984–1985, 1987–1992
Harley Davidson FXRS Low Rider
1986
Harley Davidson FXRS-Conv Low Rider Convertible
1990–1993
Harley Davidson FXRS-SP Low Rider Sport
1986–1993
Harley Davidson FXRT Sport Glide
1984–1992
Harley Davidson FXSB Low Rider - Belt
1984–1985
Harley Davidson FXST Softail
1984–1990, 1999
Harley Davidson FXSTB Softail Night Train
1999
Harley Davidson FXSTC Softail Custom
1986–1999
Harley Davidson FXSTS Softail Springer
1988–1999
Harley Davidson FXSTSB Softail Bad Boy
1995–1997
Harley Davidson FXWG Wide Glide
1984–1986