GFB Subaru Lightweight Non-Underdrive Crank Pulley, 2002-2014 WRX & 2004-2021 STi

GFB's lightweight non-underdrive crank pulley (part number 2009) is made from anodized aircraft-grade billet 6061-T6 aluminium and offers sharper throttle response and faster acceleration. Kit includes: crank pulley only (original factory belts are used).
GFB pulleys are designed to improve acceleration by reducing the rotational mass (inertia) on the crankshaft. The effect is similar to a lighter flywheel, and the engine feels more lively and willing to rev.
We know that people are sometimes concerned about possible adverse effects of lightweight pulleys, but rest assured we have done our homework! Whilst it is true that some engine types do suffer harmonic issues from lightweight pulleys, we steer clear of those. The kits we release are thoroughly application tested and do NOT cause engine damage in the short or long term.

Included:
• GFB Subaru Lightweight Non-Underdrive Crank Pulley, '02-'14 WRX & '04-'21 STi

Features:
• Our products are manufactured in Australia and the company is accredited to ISO 9001, which ensures our products meet stringent quality requirements at all stages of manufacture.