# S&S Cycle 79-84 BT 88in Sidewinder 3-5/8in Big Bore Cylinder Kit - Gloss Black

Installing this 3-5/8" big bore kit will increase the displacement of stock 80" HD® shovelhead engines to 88" using the stock 4-1/4" flywheels. This may also be used to build an 88" engine in 74" shovelheads if a 4-1/4" stroke flywheel assemble is also installed. The kit includes S&S 3-5/8" bore cylinders, 3-5/8" bore forged pistons with rings and wristpins, S&S stainless steel head bolts, base nuts, head gaskets, base gaskets, exhcaust gaskets, and instructions. Compression is 7.5:1. The cylinders are stock length so stock length pushrods and manifold may be used.

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:** 2853.14 CAD
- **Vendor:** S&S Cycle
- **Type:** Piston Sets - Powersports

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 2853.14 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-88in-sidewinder-3-5-8in-big-bore-cylinder-kit-gloss-black)
> Updated: 2026-07-13