Lightweight Non-Underdrive Crank Pulley for Subaru EJ Engines

This GFB lightweight crank pulley is engineered as a direct replacement for the factory crankshaft pulley used on a wide range of Subaru EJ-series turbocharged vehicles. By reducing rotating mass at the crankshaft, it improves rotational efficiency without altering factory accessory speeds.

Factory Drive Ratios Retained

This is a non-underdrive crank pulley. The original pulley diameter is maintained to ensure normal operation of the alternator, power steering pump, air conditioning, and other belt-driven accessories.

Reduced Rotating Mass

Manufactured from lightweight aluminium, the pulley significantly reduces inertia compared to the factory steel unit while maintaining precise belt alignment and durability.

Direct Bolt-On Replacement

Designed to bolt directly in place of the factory crank pulley, this component installs without modification on compatible Subaru EJ-series turbo engines.