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.
Features:
- 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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