# S&S Cycle 79-84 BT 3-1/2in +.030in 80in LC Forged Pistons

These 3-1/2" +.030" bore pistons fit 1979-'84 80" HD® big twin engines, producing 8:1 compression with stock unmodified cylinder heads.. The modern alloys used in these pistons, coupled with the advanced skirt profiles, allow them to be fit tighter resulting in low engine noise and long engine life. In the past, this could only be achieved with weaker cast pistons. S&S® will fit these pistons to your existing cylinders (when purchasing new cylinders, pistons can be fit to them as an option).

This Part Fits:

Year

Make

Model

Submodel

1979-1984

Harley-Davidson

FLH Electra Glide

Base

1980-1984

Harley-Davidson

FLHS Electra Glide Sport

Base

1984

Harley-Davidson

FLHX Electra Glide Special

Base

1980-1983

Harley-Davidson

FLT Tour Glide

Base

1981

Harley-Davidson

FLTC Tour Glide Classic

Base

1982-1983

Harley-Davidson

FXR Super Glide II

Base

## Details

- **Price:** 589.85 CAD
- **Vendor:** S&S Cycle
- **Type:** Piston Sets - Powersports

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 589.85 CAD | In stock |

## Images

- User 1

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> Source: [Standard Auto Part](https://www.standardautopart.com/products/s-s-cycle-79-84-bt-3-1-2in-030in-80in-lc-forged-pistons)
> Updated: 2026-07-01