Lightweight more durable front spool. One of the main features is that the spool has steel outputs rather than the slider type interface included in the original kit. These will provide a longer life platform with less expense replacing sliders and not forgetting the lower weight...win...win!
All spares available separately.
With both the spool and diff outputs we recommend using a small amount of either U1300 or U1957 grease on the drive shaft pin/output interface.