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- Crankshaft features full weight flywheels with removable pinion and sprocket shafts, trued and balanced for cast pistons
- Unit includes forged and machined H-beam Sifton connecting rod set of certified 4340 steel with multistage heat treatment
- Flywheels are fitted with Torrington rollers, with alloy bearing retainer cages
- Fits 1955-1957 FL models
- Made in USA