# S&S Cycle 99-06 BT 3.927in Standard Bore 97in Big Bore Forged Piston Set

These big bore pistons work with the stock 4" stroke flywheels to convert any 1999-'06 HD® big twin engine from 88" to 97" displacement with 9.7:1 compression with stock heads. Stock cylinders may be bored to accomodate larger pistons, but we recommend S&S 3.927" bore cylinders which feature high strength alloyed cast iron liners. Pistons are compatible with stock rods with tapered wristpin ends. S&S® 3.927" bore pistons are machined to such close tolerances that it is not necessary to measure the piston. Just bore cylinders to nominal diameter +/- 0.0005" for correct clearance. Additionally, the low friction coating on the piston skirt makes taking measurements very difficult. 3.927" standard bore.

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

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 734.97 CAD | In stock |

## Images

- Photo - Primary
- User 1

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> Source: [Standard Auto Part](https://www.standardautopart.com/products/s-s-cycle-99-06-bt-3-927in-standard-bore-97in-big-bore-forged-piston-set)
> Updated: 2026-07-01