OEM Harley Davidson Twin Cam Exhaust Valve NOS Touring Softail Dyna FXD 18085-99
Part #: 18085-99
Harley-Davidson part number 18085-99 is a genuine OEM Exhaust Valve designed for Twin Cam engines.
- Head Diameter: 1.565" (approx. 39.75 mm)
- Stem Diameter: 0.3101" (fits 5/16" valve guides)
- Overall Length: 4.515" to 4.525" (Standard length)
- Material: Heat-treated valve steel designed for high-temperature durability.
- Type: One-piece, typically stellite-tipped for increased wear resistance at the rocker arm contact point.
- Finish: Standard OEM valves have a smooth finish to reduce friction; aftermarket replacements (like those from Kibblewhite) often feature a "Black Diamond" or nitrided finish for better corrosion resistance.
Fitment: Harley-Davidson part number 18085-99 is a standard-sized exhaust valve with wide fitment across the Twin Cam engine platform from its introduction in 1999 through 2004.
- Twin Cam 88 (1450cc): All carbureted and fuel-injected versions (88B and 88).
- Twin Cam 95 (1550cc): Found in early Screamin' Eagle Big Bore kits and CVO models.
It is used in the cylinder heads of the following model families:
- Touring: Road King (FLHR), Electra Glide (FLHT), Road Glide (FLTR), and Street Glide models.
- Softail: Fat Boy (FLSTF), Heritage Classic (FLSTC), Night Train (FXSTB), Softail Standard (FXST), and Deuce (FXSTD).
- Dyna: Wide Glide (FXDWG), Super Glide (FXD), Low Rider (FXDL), and Fat Bob (FXDF).
- VRSC (V-Rod): Used specifically in 2002–2007 V-Rod models (as a different application from the air-cooled Big Twins).
Please make sure of fitment before buying.
NOS, did not open for pictures.
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