Bolt-In Sidewinder® 4" Big Bore Kits — 100", 4" stroke

S&S CYCLE Bolt-In Sidewinder® 4" Big Bore Kits — 100", 4" stroke – 99-06 Touring, 00-06 Softail, 99-06 Dyna

S&S CYCLE
0931-0739
910-0642

Bolt-in big-bore upgrade that raises displacement and performance without splitting the crankcases; complete kit with pistons and gaskets.

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Bolt-In Sidewinder® 4" Big Bore Kits provide a straightforward, bolt-in upgrade that increases displacement and performance without machining, balancing, or splitting the crankcases.

  • 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 to 110".
  • 10.5:1 compression (with stock 85cc heads) delivers a streetable, dependable powerband that 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. Not recommended for trike models.
: 0931-0739
In Stock

Data sheet

Type
Big Bore
Units
Kit
Color/Finish
Silver
Brand
S&S CYCLE
Bore Size
4,000"
Displacement
100"
Stroke Length
4"
Compression Ratio
10.5:1
Harley Family
Dyna
Softail
Touring

This product fits the following vehicles. Use the filters below to narrow down the list if needed.

Manufacturer Model Family Year Notes
Harley Davidson Road King Classic Touring 2004
Harley Davidson Road King Classic Touring 2000
Harley Davidson Road King Classic Touring 2001
Harley Davidson Road King Classic Touring 2002
Harley Davidson Road King Classic Touring 2003
Harley Davidson Road King Classic Touring 2006
Harley Davidson Road King Touring 1999
Harley Davidson Road King Touring 2001
Harley Davidson Road King Touring 2002
Harley Davidson Road King Touring 2003
Harley Davidson Road King Touring 2006
Harley Davidson Road King Custom Touring 2004
Harley Davidson Road King Custom Touring 2005
Harley Davidson Road King Custom Touring 2006
Harley Davidson Road King Custom Touring 2004
Harley Davidson Road King Custom Touring 2005
Harley Davidson Road King Custom Touring 2006
Harley Davidson Electra Glide Touring 2000
Harley Davidson Electra Glide Touring 2001
Harley Davidson Electra Glide Touring 2002
Harley Davidson Electra Glide Touring 2003
Harley Davidson Electra Glide Touring 2005
Harley Davidson Electra Glide Touring 2006
Harley Davidson Electra Glide Classic Touring 2002
Harley Davidson Electra Glide Classic Touring 2003
Harley Davidson Electra Glide Classic Touring 2004
Harley Davidson Electra Glide Classic Touring 2005
Harley Davidson Electra Glide Classic Touring 2004
Harley Davidson Electra Glide Classic Touring 2005
Harley Davidson Electra Glide Ultra Classic Touring 1999
Harley Davidson Electra Glide Ultra Classic Touring 2000
Harley Davidson Electra Glide Ultra Classic Touring 2001
Harley Davidson Electra Glide Ultra Classic Touring 2002
Harley Davidson Electra Glide Ultra Classic Touring 2004
Harley Davidson Electra Glide Ultra Classic Touring 2005
Harley Davidson Electra Glide Ultra Classic Touring 2006
Harley Davidson Electra Glide Touring 2005
Harley Davidson Heritage Softail Classic Softail 2005
Harley Davidson Heritage Softail Classic Softail 2001
Harley Davidson Heritage Softail Classic Softail 2002
Harley Davidson Heritage Softail Classic Softail 2003
Harley Davidson Heritage Softail Classic Softail 2005
Harley Davidson Heritage Softail Classic Softail 2006
Harley Davidson Fat Boy Softail 2000
Harley Davidson Fat Boy Softail 2001
Harley Davidson Fat Boy Softail 2002
Harley Davidson Fat Boy Softail 2005
Harley Davidson Fat Boy Softail 2006
Harley Davidson Fat Boy Softail 2001
Harley Davidson Fat Boy Softail 2003
Harley Davidson Fat Boy Softail 2004
Harley Davidson Fat Boy Softail 2006
Harley Davidson Fat Boy 15th Anniversary Softail 2005
Harley Davidson Heritage Softail Softail 2006
Harley Davidson Softail Deluxe Softail 2006
Harley Davidson Softail Deluxe Softail 2005
Harley Davidson Softail Deluxe Softail 2006
Harley Davidson Heritage Softail Springer Softail 2001
Harley Davidson Heritage Softail Springer Softail 2002
Harley Davidson Softail Springer Classic Softail 2005
Harley Davidson Softail Springer Classic Softail 2006
Harley Davidson Softail Springer Classic Softail 2005
Harley Davidson Heritage Softail Springer Softail 2003
Harley Davidson Road Glide Touring 2001
Harley Davidson Road Glide Touring 1999
Harley Davidson Road Glide Touring 2003
Harley Davidson Road Glide Touring 2005
Harley Davidson Dyna Super Glide Dyna 1999
Harley Davidson Dyna Super Glide Dyna 2002
Harley Davidson Dyna Super Glide Dyna 2004
Harley Davidson Dyna Street Bob Dyna 2006
Harley Davidson Dyna Super Glide Custom Dyna 2005
Harley Davidson Dyna Super Glide Custom Dyna 2005
Harley Davidson Dyna Super Glide 35th Anniversary Dyna 2006
Harley Davidson Dyna Low Rider Dyna 1999
Harley Davidson Dyna Low Rider Dyna 2000
Harley Davidson Dyna Low Rider Dyna 2002
Harley Davidson Dyna Low Rider Dyna 2003
Harley Davidson Dyna Low Rider Dyna 2004
Harley Davidson Dyna Low Rider Dyna 2005
Harley Davidson Dyna Low Rider Dyna 2006
Harley Davidson Dyna Wide Glide Dyna 1999
Harley Davidson Dyna Wide Glide Dyna 2000
Harley Davidson Dyna Wide Glide Dyna 2001
Harley Davidson Dyna Wide Glide Dyna 2002
Harley Davidson Dyna Wide Glide Dyna 2003
Harley Davidson Dyna Wide Glide Dyna 2004
Harley Davidson Dyna Wide Glide Dyna 2005
Harley Davidson Dyna Wide Glide Dyna 2004
Harley Davidson Dyna Wide Glide Dyna 2005
Harley Davidson Dyna Wide Glide Dyna 2006
Harley Davidson Dyna Super Glide Sport Dyna 1999
Harley Davidson Dyna Super Glide Sport Dyna 2000
Harley Davidson Dyna Super Glide Sport Dyna 2001
Harley Davidson Dyna Super Glide Sport Dyna 2002
Harley Davidson Dyna Super Glide Sport Dyna 2003
Harley Davidson Dyna Super Glide Sport Dyna 2004
Harley Davidson Dyna Super Glide Sport Dyna 2004
Harley Davidson Dyna Super Glide Sport Dyna 2005
Harley Davidson Dyna Super Glide T-Sport Dyna 2001
Harley Davidson Dyna Super Glide T-Sport Dyna 2002
Harley Davidson Dyna Super Glide T-Sport Dyna 2003
Harley Davidson Softail Softail 2001
Harley Davidson Softail Softail 2002
Harley Davidson Softail Softail 2003
Harley Davidson Softail Softail 2004
Harley Davidson Softail Softail 2005
Harley Davidson Softail Softail 2006
Harley Davidson Softail Night Train Softail 2001
Harley Davidson Softail Night Train Softail 2002
Harley Davidson Softail Night Train Softail 2003
Harley Davidson Softail Night Train Softail 2005
Harley Davidson Softail Night Train Softail 2005
Harley Davidson Softail Deuce Softail 2001
Harley Davidson Softail Deuce Softail 2003
Harley Davidson Softail Deuce Softail 2005
Harley Davidson Softail Deuce Softail 2006
Harley Davidson Softail Deuce Softail 2001
Harley Davidson Softail Deuce Softail 2002
Harley Davidson Softail Deuce Softail 2004
Harley Davidson Softail Deuce Softail 2005
Harley Davidson Softail Softail 2003
Harley Davidson Softail Softail 2005
Harley Davidson Softail Springer Softail 2000
Harley Davidson Softail Springer Softail 2001
Harley Davidson Softail Springer Softail 2002
Harley Davidson Softail Springer Softail 2003
Harley Davidson Softail Springer Softail 2004
Harley Davidson Softail Springer Softail 2005
Harley Davidson Softail Springer Softail 2006
Harley Davidson Softail Springer Softail 2003
Harley Davidson Softail Springer Softail 2004
Harley Davidson Softail Springer Softail 2005
Harley Davidson Softail Springer Softail 2006