# S&S Cycle 99-06 BT 4-1/8in Bore Cylinder & Piston Kit - Silver

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 machined with a 10.9cc dish and ar 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 silver 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

1999-2006

Harley-Davidson

FLHR Road King

Base

2004-2006

Harley-Davidson

FLHRS Road King Custom

Base

1999-2006

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

1999-2002

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-bore-cylinder-piston-kit-silver)
> Updated: 2026-07-13