# Twin Power 84-99 Evolution Big Twin Lower Rocker Box Gaskets Replaces H-D 17038-90 1 Piece Pr

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

## Details

- **Price:** 56.68 CAD
- **Vendor:** TwinPower
- **Type:** Gasket Kits

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 56.68 CAD | In stock |

## Images

- Photo - Primary

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> Source: [Standard Auto Part](https://www.standardautopart.com/products/twin-power-84-99-evolution-big-twin-lower-rocker-box-gaskets-replaces-h-d-17038-90-1-piece-pr)
> Updated: 2026-07-14