# Twin Power 66-84 Shovelhead Big Twin Head Gasket Std Bore .040 MLS Replaces H-D 16770-66 Pr

Twin Power™ head gaskets deliver premium sealing performance, ensuring maximum compression, reliability, and durability for Harley-Davidson Big Twin and M8 engines.

-   Includes two high-quality head gaskets designed for an airtight seal and maximum leak prevention
-   Precision fit for consistent compression and longevity
-   Multi Layer Steel design for superior sealing
-   Made in USA

This Part Fits:

Year

Make

Model

Submodel

1971-1980

Harley-Davidson

FLH Electra Glide

Base

1980-1984

Harley-Davidson

FLHS Electra Glide Sport

Base

1983

Harley-Davidson

FLHTC Electra Glide Classic

Base

1980-1983

Harley-Davidson

FLT Tour Glide

Base

1971-1978

Harley-Davidson

FX Super Glide

Base

1980-1982

Harley-Davidson

FXB Sturgis

Base

1983

Harley-Davidson

FXDG Disc Glide

Base

1974-1984

Harley-Davidson

FXE Super Glide

Base

1979-1984

Harley-Davidson

FXEF Fat Bob

Base

1982-1983

Harley-Davidson

FXR Super Glide II

Base

1984

Harley-Davidson

FXRDG Disc Glide

Base

1982-1983

Harley-Davidson

FXRS Low Glide

Base

1983

Harley-Davidson

FXRT Sport Glide

Base

1977-1982

Harley-Davidson

FXS Low Rider

Base

1983-1984

Harley-Davidson

FXSB Low Rider - Belt

Base

1980-1984

Harley-Davidson

FXWG Wide Glide

Base

## Details

- **Price:** 116.55 CAD
- **Vendor:** TwinPower
- **Type:** Head Gaskets

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 116.55 CAD | In stock |

## Images

- Photo - Primary

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> Source: [Standard Auto Part](https://www.standardautopart.com/products/twin-power-66-84-shovelhead-big-twin-head-gasket-std-bore-040-mls-replaces-h-d-16770-66-pr)
> Updated: 2026-07-01