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S&S 4" Stroke Flywheel For Harley Twin Cam

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This product is legal in California only for racing vehicles which may never be used, registered or licensed for use upon a highway.

S&S 4" Stroke Flywheel For Harley Twin Cam

The flywheels are the heart of any performance engine and S&S Cycle has been perfecting the art for over six decades. Stronger, more durable, and trued to a spec others can only dream of. Available with tapered connecting rods for stock style pistons or with full width connecting rods for S&S performance pistons. Three piece design with integral main shafts made from 4140 steel.


  • 4" stroke
  • Heavy duty connecting rods
  • Pinion and sprocket shafts are forged as part of the flywheel
  • CNC machined from heat-treated, closed die, steel forgings, which are 114% stronger than late style stock steel flywheels
  • Dynamically balanced
  • Trued to less than .0005" runout on pinion and sprocket shaft bearing surfaces
  • Capable of higher rpm
  • Fully compatible with gear drive cams
  • Made in the USA
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This Product Fits:

Harley Davidson
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Dyna Super Glide FXD/I 2003-2005
Dyna Super Glide Sport FXDX 1999-2002
Dyna Super Glide Sport FXDX 2003-2005
Dyna Super Glide Sport Touring FXDXT 2001-2002
Dyna Super Glide Sport Touring FXDXT 2003
Dyna Wide Glide FXDWG/I 1999-2002
Dyna Wide Glide FXDWG/I 2003-2005
Electra Glide Classic FLHTC/I 1999-2002
Electra Glide Classic FLHTC/I 2003-2006
Electra Glide Standard FLHT/I 1999-2002
Electra Glide Standard FLHT/I 2003-2006
Electra Glide Ultra Classic FLHTCU/I 1999-2002
Electra Glide Ultra Classic FLHTCU/I 2003-2006
Road Glide FLTR/I 1999-2002
Road Glide FLTR/I 2003-2006
Road King Classic FLHRC/I 1999-2002
Road King Classic FLHRC/I 2003-2006
Road King Custom FLHRS/I 1999-2002
Road King Custom FLHRS/I 2003-2006
Road King FLHR/I 1999-2002
Road King FLHR/I 2003-2006
Softail Deluxe FLSTN/I 2005-2006
Softail Deuce FXSTD/I 2000-2002
Softail Deuce FXSTD/I 2003-2006
Softail Fat Boy FLSTF/I 2000-2002
Softail Fat Boy FLSTF/I 2003-2006
Softail Heritage Classic FLSTC/I 2000-2002
Softail Heritage Classic FLSTC/I 2003-2006
Softail Heritage FLST/I 2006
Softail Heritage Springer FLSTS/I 2000-2002
Softail Heritage Springer FLSTS/I 2003
Softail Night Train FXSTB/I 2000-2002
Softail Night Train FXSTB/I 2003-2006
Softail Springer Classic FLSTSC/I 2005-2006
Softail Springer FXSTS/I 2000-2002
Softail Springer FXSTS/I 2003-2006
Softail Standard FXST/I 2000-2002
Softail Standard FXST/I 2003-2006
Street Glide FLHX/I 2006
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