Inspired by our Pro Stock Drag Race engines, these updated big bore kit utilizes a Ductile Cast Iron liner wrapped in cast aluminum for optimum thermal conductivity and performance. Bolt-in kits do not require machining, rebalancing or engine removal, and include just about everything you’ll need to complete the installation. The biggest cylinder bore that can be installed in a stock crankcase without machining!

This Part Fits:

Year Make Model Submodel 1999-2006 Harley-Davidson FLHR Road King Base 1999-2006 Harley-Davidson FLHRCI Road King Classic Base 2000-2006 Harley-Davidson FLHRI Road King Base 2004-2006 Harley-Davidson FLHRS Road King Custom Base 1999-2005 Harley-Davidson FLHTC Electra Glide Classic Base 1999-2006 Harley-Davidson FLHTCI Electra Glide Classic Base 1999-2006 Harley-Davidson FLHTCUI Electra Glide Ultra Classic Base 2006 Harley-Davidson FLST Heritage Softail Base 1999-2006 Harley-Davidson FLSTC Heritage Softail Classic Base 2001-2006 Harley-Davidson FLSTCI Heritage Softail Classic Base 1999-2006 Harley-Davidson FLSTF Fat Boy Base 2001-2006 Harley-Davidson FLSTFI Fat Boy Base 1999-2006 Harley-Davidson FLTR Road Glide Base 1999-2006 Harley-Davidson FLTRI Road Glide Base 1999-2006 Harley-Davidson FXD Dyna Super Glide Base 1999-2005 Harley-Davidson FXDL Dyna Low Rider Base 2004-2006 Harley-Davidson FXDLI Dyna Low Rider Base 1999-2006 Harley-Davidson FXDWG Dyna Wide Glide Base 2004-2006 Harley-Davidson FXDWGI Dyna Wide Glide Base 1999-2005 Harley-Davidson FXDX Dyna Super Glide Sport Base 2001-2003 Harley-Davidson FXDXT Dyna Super Glide T-Sport Base 1999-2006 Harley-Davidson FXSTB Night Train Base 2001-2006 Harley-Davidson FXSTBI Night Train Base 2000-2006 Harley-Davidson FXSTD Softail Deuce Base 2001-2006 Harley-Davidson FXSTDI Softail Deuce Base 2003-2004 Harley-Davidson FXSTDSE Screamin Eagle Softail Deuce Base 2001-2006 Harley-Davidson FXSTI Softail Standard Base 1999-2006 Harley-Davidson FXSTS Springer Softail Base 2001-2006 Harley-Davidson FXSTSI Springer Softail Base