- Flywheels are CNC machined from heat-treated, closed die, steel forgings, and are stronger than cast iron or late style steel flywheels
- Replaces the original flywheels in S&S® 80″ SH80 engines with alternator style crankcases for ’70-’84 Big Twin
- Can be used to overhaul an S&S engine or to build a custom engine using similar crankcases and pistons
- Features 4-1/4″ stroke, 8-1/2″ diameter flywheels, and 7.440″ connecting rods
- May also be used in 88″ engines with 3-5/8″ bore cylinders
- Made in the USA
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