Lightweight Underdrive Pulley Kit for Subaru Turbo Engines

The GFB Lightweight Underdrive Pulley Kit replaces the factory accessory pulleys on compatible Subaru turbo models with a matched set of lightweight aluminium components. The pulleys feature underdrive ratios to reduce the load from belt-driven accessories while also lowering rotating mass.

Underdrive Pulley Design

This kit uses underdrive pulley ratios to slow accessory speed relative to engine speed, reducing parasitic load from belt-driven components. The pulleys are designed to work together as a matched set to maintain correct belt alignment.

Lightweight Aluminium Construction

Each pulley is precision machined from lightweight aluminium to reduce inertia compared to the factory steel pulleys while retaining accurate fitment and durability.

Direct Replacement Kit

The pulleys are designed as direct replacements for the factory components on the listed vehicles and install without modification when fitted as a complete set.