The PERRIN crank pulley hub for Subaru FA/FB engines is a hub-only replacement with a larger outer diameter intended for applications requiring that specific hub interface. It serves as the central mounting piece for crank pulleys on compatible Subaru engines, allowing technicians to replace or reuse pulley components without swapping the entire assembly. Useful where a larger OD hub is specified.
PERRIN Subaru FA/FB Engines Crank Pulley Hub Only (w/Large OD)