# S&S Cycle 99-06 BT 4 1/8in Low Compression Bore Cylinder & Pistons Kit For 124in Hot Set Up Kit

This big bore cylinder and piston kit contains S&S 4-1/8" bore cylinders and forged pistons, rings, wrist pins, head and base gaskets. Pistons are dished dome design intended for use with stock cylinder heads. The cylinders are machined with the stock bolt pattern and are intended for use in stock crankcases of 1999-'06 big twin engines. Designed for 4-5/8" stroke flywheels, resulting in 124" displacement. Cylinder finish is a durable wrinkle black powder coat. For best performance, appropriate camshafts, performance air cleaner, performance exhaust and fuel system tuning are required.

-   Crankcases must be bored to accept the larger 4-1/8" bore cylinders

This Part Fits:

Year

Make

Model

Submodel

1999-2001,2003-2006

Harley-Davidson

FLHR Road King

Base

2004-2006

Harley-Davidson

FLHRS Road King Custom

Base

1999-2001,2003-2006

Harley-Davidson

FLHT Electra Glide Standard

Base

2003

Harley-Davidson

FLHTC Electra Glide Classic

Base

2006

Harley-Davidson

FLHX Street Glide

Base

2006

Harley-Davidson

FLST Heritage Softail

Base

2000-2006

Harley-Davidson

FLSTC Heritage Softail Classic

Base

2000-2006

Harley-Davidson

FLSTF Fat Boy

Base

2005-2006

Harley-Davidson

FLSTN Softail Deluxe

Base

2000-2003

Harley-Davidson

FLSTS Heritage Springer

Base

1999-2001

Harley-Davidson

FLTR Road Glide

Base

1999-2005

Harley-Davidson

FXD Dyna Super Glide

Base

2005

Harley-Davidson

FXDC Super Glide Custom

Base

1999-2005

Harley-Davidson

FXDL Dyna Low Rider

Base

1999-2005

Harley-Davidson

FXDWG Dyna Wide Glide

Base

2001

Harley-Davidson

FXDWG2 CVO Dyna Wide Glide

Base

2002

Harley-Davidson

FXDWG3 CVO Dyna Wide Glide

Base

1999-2005

Harley-Davidson

FXDX Dyna Super Glide Sport

Base

2004-2005

Harley-Davidson

FXDXI Dyna Super Glide Sport

Base

2001-2003

Harley-Davidson

FXDXT Dyna Super Glide T-Sport

Base

2000-2006

Harley-Davidson

FXST Softail Standard

Base

2000-2006

Harley-Davidson

FXSTB Night Train

Base

2001-2006

Harley-Davidson

FXSTBI Night Train

Base

2000-2006

Harley-Davidson

FXSTD Softail Deuce

Base

2000-2006

Harley-Davidson

FXSTS Springer Softail

Base

## Details

- **Price:** 2352.73 CAD
- **Vendor:** S&S Cycle
- **Type:** Piston Sets - Powersports

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 2352.73 CAD | In stock |

## Images

- User 1

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> Source: [Standard Auto Part](https://www.standardautopart.com/products/s-s-cycle-99-06-bt-4-1-8in-low-compression-bore-cylinder-pistons-kit-for-124in-hot-set-up-kit)
> Updated: 2026-07-13