S&S Cycle 99-06 BT 4-1/8in Bore Cylinder & Piston Kit - Silver
Special Order
This part is still available to order. Once you place your order, we’ll submit it directly to S&S Cycle, and they’ll ship it straight to you.
Delivery times can vary depending on the brand, so we can’t guarantee an exact arrival date. What we can guarantee is that we’ll stay on top of your order, monitor its progress, and keep you updated until it reaches your door.
Special-order items are typically not kept in stock by most retailers. By ordering through us, your order is placed directly with S&S Cycle, assuring you get the part as quickly as possible.
Want to get an estimated delivery timeframe before ordering? Contact us through our contact page, and we’ll be happy to find out for you.
Couldn't load pickup availability
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 |
Videos for this part


