# Twin Power 84-91 Evo Big Twin Rocker Box Gasket Kit Replaces H-D 17038-90

Twin Power™ rocker box gasket kits include the critical gaskets needed to reseal rocker boxes on popular Big Twin and Sportster engines, helping control top-end oil leaks.

-   Ideal for top-end refreshes, noise diagnosis, or routine gasket replacement
-   Help restore proper sealing around rocker box covers and mating surfaces
-   Includes all gaskets for rocker box removal and replacement
-   Made in USA

This Part Fits:

Year

Make

Model

Submodel

1987-1991

Harley-Davidson

FLHS Electra Glide Sport

Base

1984-1990

Harley-Davidson

FLHTC Electra Glide Classic

Base

1989-1991

Harley-Davidson

FLHTCU Electra Glide Ultra Classic

Base

1986-1990

Harley-Davidson

FLST Heritage Softail

Base

1988-1991

Harley-Davidson

FLSTC Heritage Softail Classic

Base

1990-1991

Harley-Davidson

FLSTF Fat Boy

Base

1984-1991

Harley-Davidson

FXR Super Glide II

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

1985-1991

Harley-Davidson

FXRPF Police

Base

1984-1991

Harley-Davidson

FXRS Low Glide

Base

1990-1991

Harley-Davidson

FXRS-Conv Low Rider Sport Convertible

Base

1986-1991

Harley-Davidson

FXRS-SP Low Rider Sport

Base

1984-1991

Harley-Davidson

FXRT Sport Glide

Base

1984-1991

Harley-Davidson

FXST Softail Standard

Base

1986-1991

Harley-Davidson

FXSTC Softail Custom

Base

1988-1991

Harley-Davidson

FXSTS Springer Softail

Base

## Details

- **Price:** 123.45 CAD
- **Vendor:** TwinPower
- **Type:** Gasket Kits

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 123.45 CAD | In stock |

## Images

- Photo - Primary

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> Source: [Standard Auto Part](https://www.standardautopart.com/products/twin-power-84-91-evo-big-twin-rocker-box-gasket-kit-replaces-h-d-17038-90)
> Updated: 2026-07-01