Twin Power 84-99 Evolution Big Twin Lower Rocker Box Gaskets Replaces H-D 17038-90 1 Piece Pr
Why this price?
$23.99 is MSRP, the lowest price TwinPower lets us list it at. Additionally, Pro members get $4.08 back on this part.
$23.99 − $4.08 = $19.91
Not sure it fits? Read our tips.
Fitment tips
Fitment can come down to more than year, make and model. Sometimes the sub-model decides, so start with the fitment table below.
- Drive type. If your car is all-wheel drive, make sure the part is for all-wheel drive, not rear-wheel drive.
- Engine size. For engine parts, make sure the engine size on the product matches your engine.
- Transmission. Manual and automatic cars often take different parts.
- Body style. Sedan or hatch, two-door or four-door, cab and bed length on trucks.
Manufacturer data can sometimes have imperfections. Still not sure? We are happy to help.
Send us a message and we will confirm the fit.
Couldn't load pickup availability
Twin Power™ lower rocker box gaskets provide reliable sealing between the rocker box and head on Twin Cam and Evolution Big Twin engines, helping reduce top-end oil leaks.
- Direct fit replacements for OEM lower rocker box gaskets on listed Twin Cam and Evo Big Twins
- Help maintain proper sealing at a common leak point
- Includes lower 1 piece.
- Made in USA
This Part Fits:
| Year | Make | Model | Submodel |
|---|---|---|---|
| 1994-1998 | Harley-Davidson | FLHR Road King | Base |
| 1998 | Harley-Davidson | FLHRCI Road King Classic | Base |
| 1996-1997 | Harley-Davidson | FLHRI Road King | Base |
| 1987-1993 | Harley-Davidson | FLHS Electra Glide Sport | Base |
| 1986-1998 | Harley-Davidson | FLHT Electra Glide Standard | Base |
| 1984-1998 | Harley-Davidson | FLHTC Electra Glide Classic | Base |
| 1996-1998 | Harley-Davidson | FLHTCI Electra Glide Classic | Base |
| 1989-1997 | Harley-Davidson | FLHTCU Electra Glide Ultra Classic | Base |
| 1995-1999 | Harley-Davidson | FLHTCUI Electra Glide Ultra Classic | Base |
| 1986-1990 | Harley-Davidson | FLST Heritage Softail | Base |
| 1988-1999 | Harley-Davidson | FLSTC Heritage Softail Classic | Base |
| 1990-1999 | Harley-Davidson | FLSTF Fat Boy | Base |
| 1993 | Harley-Davidson | FLSTN Heritage Softail Nostalgia | Base |
| 1994-1996 | Harley-Davidson | FLSTN Heritage Softail Special | Base |
| 1997-1999 | Harley-Davidson | FLSTS Heritage Springer | Base |
| 1996 | Harley-Davidson | FLTCUI Tour Glide Ultra Classic | Base |
| 1998 | Harley-Davidson | FLTR Road Glide | Base |
| 1998 | Harley-Davidson | FLTRI Road Glide | Base |
| 1995-1998 | Harley-Davidson | FXD Dyna Super Glide | Base |
| 1993-1998 | Harley-Davidson | FXDL Dyna Low Rider | Base |
| 1994-1998 | Harley-Davidson | FXDS-Conv Dyna Convertible | Base |
| 1993-1998 | Harley-Davidson | FXDWG Dyna Wide Glide | Base |
| 1984-1994 | Harley-Davidson | FXR Super Glide II | Base |
| 1999 | Harley-Davidson | FXR2 | Base |
| 1999 | Harley-Davidson | FXR3 | Base |
| 1985-1987 | Harley-Davidson | FXRC Low Rider Chrome | Base |
| 1986 | Harley-Davidson | FXRD Sport Glide Grand Touring | Base |
| 1984 | Harley-Davidson | FXRDG Disc Glide | Base |
| 1985-1995 | Harley-Davidson | FXRPF Police | Base |
| 1984-1992 | Harley-Davidson | FXRS Low Glide | Base |
| 1990-1994 | Harley-Davidson | FXRS-Conv Low Rider Sport Convertible | Base |
| 1984-1992 | Harley-Davidson | FXRT Sport Glide | Base |
| 1984-1999 | Harley-Davidson | FXST Softail Standard | Base |
| 1999 | Harley-Davidson | FXSTB Night Train | Base |
| 1986-1999 | Harley-Davidson | FXSTC Softail Custom | Base |
| 1988-1999 | Harley-Davidson | FXSTS Springer Softail | Base |
| 1995-1997 | Harley-Davidson | FXSTSB Bad Boy | Base |
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