The 124 cubic inch T124 low compression Long Block engine fits 1999-'06 HD big twins except 2006 Dyna models. Long Block engines do not include a fuel or ignition system, so they can be used for either carbureted or EFI applications. If you already have a performance ignition, larger carburetor or a larger throttle body and EFI tuner, they can be used with this engine. The cylinder heads are specially machined to compensate for the longer cylinders so a stock length manifold or throttle body will fit perfectly, and the cylinder head breathers are compatible air cleaners designed for a stock engine. Stock non programable engine management systems should not be used because they are not designed for an engine this large. Engine features 4-5/8" stroke X 4-1/8" bore at 10.2:1 compression, S&S 585 gear drive Easy Start cams, S&S TC3 cam plate and oil pump, and black wrinkle powder coat finish that matches stock engine components. This engine has slightly less compression than our high performance T124 engine, making it more tolerent of variations in fuel quality, and a better choice for heavier vehicles. Two year warranty.
*T series engines are not compatible with HD Softail models**T series engines are not compatible with HD Softail models*
Fitment
| Year(s) | Make | Model Code | Model |
|---|---|---|---|
| 1999-2006 | Harley-Davidson | — | Big Twin except 2006 Dyna |
| Year | Make | Model |
|---|---|---|
| 1999 | Harley-Davidson | Electra Glide Police FLHTPI |
| 1999 | Harley-Davidson | Electra Glide Police FLHTP |
| 1999 | Harley-Davidson | Electra Glide Ultra Classic FLHTCU |
| 1999 | Harley-Davidson | FLHR Road King |
| 1999 | Harley-Davidson | FLHRCI Road King Classic |
| 1999 | Harley-Davidson | FLHT Electra Glide Standard |
| 1999 | Harley-Davidson | FLHTC Electra Glide Classic |
| 1999 | Harley-Davidson | FLHTCI Electra Glide Classic |
| 1999 | Harley-Davidson | FLHTCUI Electra Glide Ultra Classic |
| 1999 | Harley-Davidson | FLTR Road Glide |
| 1999 | Harley-Davidson | FLTRI Road Glide |
| 1999 | Harley-Davidson | FXD Dyna Super Glide |
| 1999 | Harley-Davidson | FXDL Dyna Low Rider |
| 1999 | Harley-Davidson | FXDS-Conv Dyna Convertible |
| 1999 | Harley-Davidson | FXDWG Dyna Wide Glide |
| 1999 | Harley-Davidson | FXDX Dyna Super Glide Sport |
| 1999 | Harley-Davidson | Road King EFI FLHR |
| 2000 | Harley-Davidson | Electra Glide Police FLHTPI |
| 2000 | Harley-Davidson | Electra Glide Police FLHTP |
| 2000 | Harley-Davidson | Electra Glide Standard EFI FLHTI |
| 2000 | Harley-Davidson | Electra Glide Ultra Classic FLHTCU |
| 2000 | Harley-Davidson | FLHR Road King |
| 2000 | Harley-Davidson | FLHRCI Road King Classic |
| 2000 | Harley-Davidson | FLHRI Road King |
| 2000 | Harley-Davidson | FLHT Electra Glide Standard |
| 2000 | Harley-Davidson | FLHTC Electra Glide Classic |
| 2000 | Harley-Davidson | FLHTCI Electra Glide Classic |
| 2000 | Harley-Davidson | FLHTCUI Electra Glide Ultra Classic |
| 2000 | Harley-Davidson | FLTR Road Glide |
| 2000 | Harley-Davidson | FLTRI Road Glide |
| 2000 | Harley-Davidson | FLTRSEI Screamin Eagle Road Glide |
| 2000 | Harley-Davidson | FXD Dyna Super Glide |
| 2000 | Harley-Davidson | FXDL Dyna Low Rider |
| 2000 | Harley-Davidson | FXDS-Conv Dyna Convertible |
| 2000 | Harley-Davidson | FXDWG Dyna Wide Glide |
| 2000 | Harley-Davidson | FXDX Dyna Super Glide Sport |
| 2000 | Harley-Davidson | Wide Glide EFI FXDWGI |
| 2001 | Harley-Davidson | Electra Glide Police FLHTPI |
| 2001 | Harley-Davidson | Electra Glide Police FLHTP |
| 2001 | Harley-Davidson | Electra Glide Standard EFI FLHTI |
| 2001 | Harley-Davidson | Electra Glide Ultra Classic FLHTCU |
| 2001 | Harley-Davidson | FLHR Road King |
| 2001 | Harley-Davidson | FLHRCI Road King Classic |
| 2001 | Harley-Davidson | FLHRI Road King |
| 2001 | Harley-Davidson | FLHT Electra Glide Standard |
| 2001 | Harley-Davidson | FLHTC Electra Glide Classic |
| 2001 | Harley-Davidson | FLHTCI Electra Glide Classic |
| 2001 | Harley-Davidson | FLHTCUI Electra Glide Ultra Classic |
| 2001 | Harley-Davidson | FLTR Road Glide |
| 2001 | Harley-Davidson | FLTRI Road Glide |
| 2001 | Harley-Davidson | FLTRSEI2 Screamin Eagle Road Glide 2 |
| 2001 | Harley-Davidson | FXD Dyna Super Glide |
| 2001 | Harley-Davidson | FXDL Dyna Low Rider |
| 2001 | Harley-Davidson | FXDWG Dyna Wide Glide |
| 2001 | Harley-Davidson | FXDWG2 CVO Dyna Wide Glide |
| 2001 | Harley-Davidson | FXDX Dyna Super Glide Sport |
| 2001 | Harley-Davidson | FXDXT Dyna Super Glide T-Sport |
| 2001 | Harley-Davidson | Wide Glide EFI FXDWGI |
| 2002 | Harley-Davidson | Electra Glide Police FLHTPI |
| 2002 | Harley-Davidson | Electra Glide Police FLHTP |
| 2002 | Harley-Davidson | Electra Glide Standard EFI FLHTI |
| 2002 | Harley-Davidson | Electra Glide Ultra Classic FLHTCU |
| 2002 | Harley-Davidson | FLHR Road King |
| 2002 | Harley-Davidson | FLHRCI Road King Classic |
| 2002 | Harley-Davidson | FLHRI Road King |
| 2002 | Harley-Davidson | FLHRSEI Screamin Eagle Road King |
| 2002 | Harley-Davidson | FLHT Electra Glide Standard |
| 2002 | Harley-Davidson | FLHTC Electra Glide Classic |
| 2002 | Harley-Davidson | FLHTCI Electra Glide Classic |
| 2002 | Harley-Davidson | FLHTCUI Electra Glide Ultra Classic |
| 2002 | Harley-Davidson | FLTR Road Glide |
| 2002 | Harley-Davidson | FLTRI Road Glide |
| 2002 | Harley-Davidson | FXD Dyna Super Glide |
| 2002 | Harley-Davidson | FXDL Dyna Low Rider |
| 2002 | Harley-Davidson | FXDWG Dyna Wide Glide |
| 2002 | Harley-Davidson | FXDWG3 CVO Dyna Wide Glide |
| 2002 | Harley-Davidson | FXDX Dyna Super Glide Sport |
| 2002 | Harley-Davidson | FXDXT Dyna Super Glide T-Sport |
| 2002 | Harley-Davidson | Wide Glide EFI FXDWGI |
| 2003 | Harley-Davidson | Electra Glide Police FLHTPI |
| 2003 | Harley-Davidson | Electra Glide Police FLHTP |
| 2003 | Harley-Davidson | Electra Glide Ultra Classic FLHTCU |
| 2003 | Harley-Davidson | FLHR Road King |
| 2003 | Harley-Davidson | FLHRCI Road King Classic |
| 2003 | Harley-Davidson | FLHRI Road King |
| 2003 | Harley-Davidson | FLHRSEI2 Screamin Eagle Road King 2 |
| 2003 | Harley-Davidson | FLHT Electra Glide Standard |
| 2003 | Harley-Davidson | FLHTC Electra Glide Classic |
| 2003 | Harley-Davidson | FLHTCI Electra Glide Classic |
| 2003 | Harley-Davidson | FLHTCUI Electra Glide Ultra Classic |
| 2003 | Harley-Davidson | FLHTI Electra Glide Standard |
| 2003 | Harley-Davidson | FLTR Road Glide |
| 2003 | Harley-Davidson | FLTRI Road Glide |
| 2003 | Harley-Davidson | FXD Dyna Super Glide |
| 2003 | Harley-Davidson | FXDL Dyna Low Rider |
| 2003 | Harley-Davidson | FXDWG Dyna Wide Glide |
| 2003 | Harley-Davidson | FXDX Dyna Super Glide Sport |
| 2003 | Harley-Davidson | FXDXT Dyna Super Glide T-Sport |
| 2003 | Harley-Davidson | Wide Glide EFI FXDWGI |
| 2004 | Harley-Davidson | Electra Glide Police FLHTPI |
| 2004 | Harley-Davidson | Electra Glide Police FLHTP |
| 2004 | Harley-Davidson | Electra Glide Ultra Classic FLHTCU |
| 2004 | Harley-Davidson | FLHR Road King |
| 2004 | Harley-Davidson | FLHRCI Road King Classic |
| 2004 | Harley-Davidson | FLHRI Road King |
| 2004 | Harley-Davidson | FLHRS Road King Custom |
| 2004 | Harley-Davidson | FLHRSI Road King Custom |
| 2004 | Harley-Davidson | FLHT Electra Glide Standard |
| 2004 | Harley-Davidson | FLHTC Electra Glide Classic |
| 2004 | Harley-Davidson | FLHTCI Electra Glide Classic |
| 2004 | Harley-Davidson | FLHTCSE Screamin Eagle Electra Glide |
| 2004 | Harley-Davidson | FLHTCUI Electra Glide Ultra Classic |
| 2004 | Harley-Davidson | FLHTI Electra Glide Standard |
| 2004 | Harley-Davidson | FLTR Road Glide |
| 2004 | Harley-Davidson | FLTRI Road Glide |
| 2004 | Harley-Davidson | FXD Dyna Super Glide |
| 2004 | Harley-Davidson | FXDI Dyna Super Glide |
| 2004 | Harley-Davidson | FXDL Dyna Low Rider |
| 2004 | Harley-Davidson | FXDLI Dyna Low Rider |
| 2004 | Harley-Davidson | FXDWG Dyna Wide Glide |
| 2004 | Harley-Davidson | FXDWGI Dyna Wide Glide |
| 2004 | Harley-Davidson | FXDX Dyna Super Glide Sport |
| 2004 | Harley-Davidson | FXDXI Dyna Super Glide Sport |
| 2005 | Harley-Davidson | Electra Glide Police FLHTPI |
| 2005 | Harley-Davidson | Electra Glide Police FLHTP |
| 2005 | Harley-Davidson | Electra Glide Ultra Classic FLHTCU |
| 2005 | Harley-Davidson | FLHR Road King |
| 2005 | Harley-Davidson | FLHRCI Road King Classic |
| 2005 | Harley-Davidson | FLHRI Road King |
| 2005 | Harley-Davidson | FLHRS Road King Custom |
| 2005 | Harley-Davidson | FLHRSI Road King Custom |
| 2005 | Harley-Davidson | FLHT Electra Glide Standard |
| 2005 | Harley-Davidson | FLHTC Electra Glide Classic |
| 2005 | Harley-Davidson | FLHTCI Electra Glide Classic |
| 2005 | Harley-Davidson | FLHTCSE2 Screamin Eagle Electra Glide 2 |
| 2005 | Harley-Davidson | FLHTCUI Electra Glide Ultra Classic |
| 2005 | Harley-Davidson | FLHTI Electra Glide Standard |
| 2005 | Harley-Davidson | FLTR Road Glide |
| 2005 | Harley-Davidson | FLTRI Road Glide |
| 2005 | Harley-Davidson | FXD Dyna Super Glide |
| 2005 | Harley-Davidson | FXDC Super Glide Custom |
| 2005 | Harley-Davidson | FXDCI Super Glide Custom |
| 2005 | Harley-Davidson | FXDI Dyna Super Glide |
| 2005 | Harley-Davidson | FXDL Dyna Low Rider |
| 2005 | Harley-Davidson | FXDLI Dyna Low Rider |
| 2005 | Harley-Davidson | FXDWG Dyna Wide Glide |
| 2005 | Harley-Davidson | FXDWGI Dyna Wide Glide |
| 2005 | Harley-Davidson | FXDX Dyna Super Glide Sport |
| 2005 | Harley-Davidson | FXDXI Dyna Super Glide Sport |
| 2006 | Harley-Davidson | Electra Glide Classic FLHTC |
| 2006 | Harley-Davidson | Electra Glide Police FLHTPI |
| 2006 | Harley-Davidson | Electra Glide Police FLHTP |
| 2006 | Harley-Davidson | Electra Glide Ultra Classic FLHTCU |
| 2006 | Harley-Davidson | FLHR Road King |
| 2006 | Harley-Davidson | FLHRCI Road King Classic |
| 2006 | Harley-Davidson | FLHRI Road King |
| 2006 | Harley-Davidson | FLHRS Road King Custom |
| 2006 | Harley-Davidson | FLHRSI Road King Custom |
| 2006 | Harley-Davidson | FLHT Electra Glide Standard |
| 2006 | Harley-Davidson | FLHTCI Electra Glide Classic |
| 2006 | Harley-Davidson | FLHTCUI Electra Glide Ultra Classic |
| 2006 | Harley-Davidson | FLHTCUSE Screamin Eagle Ultra Classic Electra Glide |
| 2006 | Harley-Davidson | FLHTI Electra Glide Standard |
| 2006 | Harley-Davidson | FLHX Street Glide |
| 2006 | Harley-Davidson | FLHXI Street Glide |
| 2006 | Harley-Davidson | FLTR Road Glide |
| 2006 | Harley-Davidson | FLTRI Road Glide |
Fitment details provided by supplier.