Description
Kb Performance - KB425C.020 - Piston Kit - 3.750" +0.020" - 8.8:1 CR - 88" Twin Cam
Features
- Manufactured from high-strength, T-5 heat-treated, 390 hypereutectic aluminum alloy
- Allows a tighter fit and longer piston and ring life
- Diamond-machined pistons are held to plus or minus one gram weight and less than one-half-thousandth-inch (.0005") tolerances from piston to piston
- Each kit contains two pistons, pins, spiral-lock pin clips and Hastings moly rings
- Replacement piston rings sold separately
- KB pistons can be installed tighter than other pistons. This results in less piston rock and better ring seal. Please read instructions included with piston for correct piston clearance.
- Due to the thermal conductivity and design of KB pistons, special attention is required to the top ring end gap. Please read instructions furnished with piston for correct ring installation.
Specs
| Displacement | 88'' |
| Product Name | Piston Kit |
| Bore Oversize - Imperial | +0.020'' |
| Riding Style | Street |
| Stroke Length Imperial | 4.000'' |
| Units | Kit |
| Compression Ratio Imperial | 8.8:1 |
| Ring Material | Moly Coated |
| Bore Size Imperial | 3.750'' |
| Piston Head Shape | Flat Top |
| Piston Material | Hypereutectic Alloy |
Fitment
| 2005 | Harley-Davidson | 15th Anniversary Fat Boy FLSTF |
| 2006 | Harley-Davidson | Electra Glide Classic FLHTC |
| 1999-2006 | Harley-Davidson | Electra Glide Police FLHTPI |
| 1999-2006 | Harley-Davidson | Electra Glide Police FLHTP |
| 2000-2002 | Harley-Davidson | Electra Glide Standard EFI FLHTI |
| 1999-2006 | Harley-Davidson | Electra Glide Ultra Classic FLHTCU |
| 1999-2006 | Harley-Davidson | FLHR Road King |
| 1999-2006 | Harley-Davidson | FLHRCI Road King Classic |
| 2000-2006 | Harley-Davidson | FLHRI Road King |
| 2004-2006 | Harley-Davidson | FLHRS Road King Custom |
| 1999-2006 | Harley-Davidson | FLHT Electra Glide Standard |
| 1999-2005 | Harley-Davidson | FLHTC Electra Glide Classic |
| 1999-2006 | Harley-Davidson | FLHTCI Electra Glide Classic |
| 1999-2006 | Harley-Davidson | FLHTCUI Electra Glide Ultra Classic |
| 2003-2006 | Harley-Davidson | FLHTI Electra Glide Standard |
| 2006 | Harley-Davidson | FLST Heritage Softail |
| 1999-2006 | Harley-Davidson | FLSTC Heritage Softail Classic |
| 2001-2006 | Harley-Davidson | FLSTCI Heritage Softail Classic |
| 1999-2006 | Harley-Davidson | FLSTF Fat Boy |
| 2001-2006 | Harley-Davidson | FLSTFI Fat Boy |
| 2006 | Harley-Davidson | FLSTI Heritage Softail |
| 2005-2006 | Harley-Davidson | FLSTN Softail Deluxe |
| 2005-2006 | Harley-Davidson | FLSTNI Softail Deluxe |
| 1999-2003 | Harley-Davidson | FLSTS Heritage Springer |
| 2005-2006 | Harley-Davidson | FLSTSC Softail Springer Classic |
| 2005-2006 | Harley-Davidson | FLSTSCI Softail Springer Classic |
| 2001-2003 | Harley-Davidson | FLSTSI Heritage Springer |
| 1999-2006 | Harley-Davidson | FLTR Road Glide |
| 1999-2006 | Harley-Davidson | FLTRI Road Glide |
| 1999-2006 | Harley-Davidson | FXD Dyna Super Glide |
| 2006 | Harley-Davidson | FXDB Street Bob |
| 2005 | Harley-Davidson | FXDC Super Glide Custom |
| 2005-2006 | Harley-Davidson | FXDCI Super Glide Custom |
| 2004-2006 | Harley-Davidson | FXDI Dyna Super Glide |
| 2006 | Harley-Davidson | FXDI35 Dyna 35th Anniversary Super Glide |
| 1999-2005 | Harley-Davidson | FXDL Dyna Low Rider |
| 2004-2006 | Harley-Davidson | FXDLI Dyna Low Rider |
| 1999-2000 | Harley-Davidson | FXDS-Conv Dyna Convertible |
| 1999-2006 | Harley-Davidson | FXDWG Dyna Wide Glide |
| 2001 | Harley-Davidson | FXDWG2 |
| 2002 | Harley-Davidson | FXDWG3 |
| 2004-2006 | Harley-Davidson | FXDWGI Dyna Wide Glide |
| 1999-2005 | Harley-Davidson | FXDX Dyna Super Glide Sport |
| 2004-2005 | Harley-Davidson | FXDXI Dyna Super Glide Sport |
| 2001-2003 | Harley-Davidson | FXDXT Dyna Super Glide T-Sport |
| 1999-2006 | Harley-Davidson | FXST Softail Standard |
| 1999-2006 | Harley-Davidson | FXSTB Night Train |
| 2001-2006 | Harley-Davidson | FXSTBI Night Train |
| 1999 | Harley-Davidson | FXSTC Softail Custom |
| 2000-2006 | Harley-Davidson | FXSTD Softail Deuce |
| 2001-2006 | Harley-Davidson | FXSTDI Softail Deuce |
| 2001-2006 | Harley-Davidson | FXSTI Softail Standard |
| 1999-2006 | Harley-Davidson | FXSTS Springer Softail |
| 2001-2006 | Harley-Davidson | FXSTSI Springer Softail |
| 2006 | Harley-Davidson | Low Rider FXDL |
| 1999 | Harley-Davidson | Road King EFI FLHR |
| 2000-2003 | Harley-Davidson | Wide Glide EFI FXDWGI |
