S&S 4″ Sidewinder Big Bore Kit for 99-17 Big Twin Models

$1,324.95$1,449.95

  • Bolt in – no machining, balancing or splitting the crankcases; install can be performed with engine still in frame
  • Cast Ductile Iron Sleeve in cast aluminum for superior heat transfer
  • 88″ engines are boosted to 100″
  • 96″ and 103″ engines are boosted 110″
  • 10.5:1 compression (w/ stock 85cc heads) makes for a very streetable and dependable engine that also responds well to performance cams
  • Complete kit includes cylinders, forged pistons, rings, piston pins, clips and gaskets
  • Not for use with S&S 79cc heads

Complete kits include:

  • cylinders
  • forged pistons
  • rings
  • piston pins
  • clips
  • gaskets

Scroll below for fitment guide.

Description

S&S Bolt-In Sidewinder 4″ Big Bore Kit for 99-17 Big Twin Models

  • Bolt in – no machining, balancing or splitting the crankcases; install can be performed with engine still in frame
  • Cast Ductile Iron Sleeve in cast aluminum for superior heat transfer
  • 88″ engines are boosted to 100″
  • 96″ and 103″ engines are boosted 110″
  • 10.5:1 compression (w/ stock 85cc heads) makes for a very streetable and dependable engine that also responds well to performance cams
  • Complete kit includes cylinders, forged pistons, rings, piston pins, clips and gaskets
  • Not for use with S&S 79cc heads.

More engine performance parts HERE.

Complete kits include:

  • cylinders
  • forged pistons
  • rings
  • piston pins
  • clips
  • gaskets

Video

https://youtu.be/71eaBfVxPoI99-06 Fits:

2006 Harley-Davidson Screamin’ Eagle Electra Glide Ultra Classic FLHTCUSE
2006 Harley-Davidson Screamin’ Eagle Fat Boy FLSTFSE2
2006 Harley-Davidson Super Glide FXD35
2006 Harley-Davidson Street Glide FLHX
2006 Harley-Davidson Street Bob FXDB
2006 Harley-Davidson Street Glide EFI FLHX
2006 Harley-Davidson Softail Heritage FLST
2006 Harley-Davidson Softail Heritage EFI FLSTI
2005-2006 Harley-Davidson Softail Deluxe FLSTN
2005-2006 Harley-Davidson Softail Springer Classic FLSTSC
2005-2006 Harley-Davidson Softail Deluxe EFI FLSTNI
2005-2006 Harley-Davidson Softail Springer Classic EFI FLSTSCI
2005-2006 Harley-Davidson Super Glide Custom EFI FXDCI
2005 Harley-Davidson Screamin’ Eagle Electra Glide FLHTCSE2
2005 Harley-Davidson Screamin’ Eagle Fat Boy FLSTFSE
2005 Harley-Davidson Super Glide Custom FXDC
2005 Harley-Davidson 15th Anniversary Fat Boy FLSTF
2004-2006 Harley-Davidson Road King Custom EFI FLHRS
2004-2006 Harley-Davidson Low Rider EFI FXDL
2004-2006 Harley-Davidson Super Glide EFI FXDI
2004-2006 Harley-Davidson Road King Custom FLHRS
2004-2005 Harley-Davidson Super Glide Sport EFI FXDXI
2004 Harley-Davidson Screamin’ Eagle Deuce FXSTDSE2
2004 Harley-Davidson Screamin’ Eagle Electra Glide FLHTCSE
2003 Harley-Davidson Screamin’ Eagle Road King FLHRSE-I2
2003 Harley-Davidson Screamin’ Eagle Deuce FXSTDSE
2002-2006 Harley-Davidson Softail Fat Boy EFI FLSTFI
2002 Harley-Davidson Screamin’ Eagle Road King FLHRSE-I
2002 Harley-Davidson Wide Glide FXDWG3
2001-2006 Harley-Davidson Softail Deuce EFI FXSTDI
2001-2006 Harley-Davidson Softail Night Train EFI FXSTBI
2001-2006 Harley-Davidson Softail Standard EFI FXSTI
2001-2006 Harley-Davidson Softail Springer EFI FXSTSI
2001-2006 Harley-Davidson Softail Heritage Classic EFI FLSTCI
2001-2003 Harley-Davidson Super Glide T-Sport FXDXT
2001-2003 Harley-Davidson Softail Heritage Springer EFI FLSTSI
2001 Harley-Davidson Screamin’ Eagle Road Glide FLTRSE-I2
2001 Harley-Davidson Wide Glide FXDWG2
2000-2006 Harley-Davidson Softail Deuce FXSTD
2000-2006 Harley-Davidson Electra Glide Standard EFI FLHTI
2000-2006 Harley-Davidson Wide Glide EFI FXDWGI
2000 Harley-Davidson Screamin’ Eagle Road Glide FLTRSE-I
1999-2006 Harley-Davidson Road King EFI FLHR
1999-2006 Harley-Davidson Electra Glide Police FLHTP
1999-2006 Harley-Davidson Road King Classic EFI FLHRC
1999-2006 Harley-Davidson Electra Glide Classic FLHTC
1999-2006 Harley-Davidson Electra Glide Ultra Classic FLHTCU
1999-2006 Harley-Davidson Road Glide EFI FLTR
1999-2006 Harley-Davidson Electra Glide Ultra Classic EFI FLHTCUI
1999-2006 Harley-Davidson Road King FLHR
1999-2006 Harley-Davidson Road Glide FLTR
1999-2006 Harley-Davidson Electra Glide Standard FLHT
1999-2006 Harley-Davidson Electra Glide Classic EFI FLHTCI
1999-2006 Harley-Davidson Electra Glide Police FLHTPI
1999-2006 Harley-Davidson Softail Standard FXST
1999-2006 Harley-Davidson Low Rider FXDL
1999-2006 Harley-Davidson Wide Glide FXDWG
1999-2006 Harley-Davidson Softail Springer FXSTS
1999-2006 Harley-Davidson Super Glide FXD
1999-2006 Harley-Davidson Softail Night Train FXSTB
1999-2006 Harley-Davidson Softail Heritage Classic FLSTC
1999-2006 Harley-Davidson Softail Fat Boy FLSTF
1999-2005 Harley-Davidson Super Glide Sport FXDX
1999-2003 Harley-Davidson Softail Heritage Springer FLSTS
1999-2000 Harley-Davidson Dyna Convertible FXDS-CONV
1999 Harley-Davidson Softail Custom FXSTC

07-17 Fits:

2016-2017 Harley-Davidson Low Rider S FXDLS
2016-2017 Harley-Davidson Softail Slim S FLSS
2016-2017 Harley-Davidson Fat Boy S FLSTFBS
2015-2016 Harley-Davidson Electra Glide Ultra Classic Low FLHTCUL
2015-2016 Harley-Davidson Electra Glide Ultra Limited Low FLHTKL
2015-2016 Harley-Davidson Road Glide Special FLTRXS
2014-2016 Harley-Davidson Street Glide Special FLHXS
2013-2017 Harley-Davidson Breakout FXSB
2012-2017 Harley-Davidson Softail Slim FLS
2012-2016 Harley-Davidson Switchback FLD
2011-2013, 2016 Harley-Davidson Road Glide Ultra FLTRU
2011-2013 Harley-Davidson Blackline FXS
2010-2016 Harley-Davidson Electra Glide Ultra Limited FLHTK
2010-2016 Harley-Davidson Fat Boy Lo FLSTFB
2010-2013, 2015-2016 Harley-Davidson Road Glide Custom FLTRX
2008-2017 Harley-Davidson Fat Bob FXDF
2008-2011 Harley-Davidson Softail Rocker C FXCWC
2008-2011 Harley-Davidson Softail Cross Bones FLSTSB
2008-2009 Harley-Davidson Softail Rocker FXCW
2007-2017 Harley-Davidson Street Bob FXDB
2007-2017 Harley-Davidson Softail Fat Boy EFI FLSTFI
2007-2017 Harley-Davidson Softail Heritage Classic EFI FLSTCI
2007-2017 Harley-Davidson Softail Deluxe EFI FLSTNI
2007-2016 Harley-Davidson Street Glide EFI FLHX
2007-2016 Harley-Davidson Road King EFI FLHR
2007-2016 Harley-Davidson Electra Glide Ultra Classic EFI FLHTCUI
2007-2014 Harley-Davidson Super Glide Custom EFI FXDCI
2007-2013 Harley-Davidson Road King Classic EFI FLHRC
2007-2013 Harley-Davidson Electra Glide Classic EFI FLHTCI
2007-2010 Harley-Davidson Softail Custom EFI FXSTC
2007-2010 Harley-Davidson Super Glide EFI FXDI
2007-2009, 2014-2017 Harley-Davidson Low Rider EFI FXDL
2007-2009 Harley-Davidson Electra Glide Standard EFI FLHTI
2007-2009 Harley-Davidson Softail Night Train EFI FXSTBI
2007-2009 Harley-Davidson Road Glide EFI FLTR
2007-2008, 2010-2017 Harley-Davidson Wide Glide EFI FXDWGI
2007 Harley-Davidson Softail Springer Classic EFI FLSTSCI
2007 Harley-Davidson Road King Custom EFI FLHRS
2007 Harley-Davidson Softail Deuce EFI FXSTDI
2007 Harley-Davidson Softail Standard EFI FXSTI

Additional information

Weight 26.9 lbs
Dimensions 10.76 × 16.24 × 13.41 in
Year

100" Kit for 1999-2006, 110" kit for 2007-2017

Finish

Wrinkle Black, Silver

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