7 products
GFB Lightened Underdrive Pulley Kit 08-14 WRX 08+ STI 09-13 Forester 03-09 Liberty
Regular price $420.00 Save $-420.00GFB pulley kits are designed to improve acceleration by reducing the rotational mass (inertia) of the belt train. The effect is similar to a lighter flywheel, and the engine feels more lively and willing to rev.
GFB Lightened Underdrive Pulley Kit Include Belts 00-07 WRX/STI 03-08 XT Forester
Regular price $420.00 Save $-420.00GFB pulley kits are designed to improve acceleration by reducing the rotational mass (inertia) of the belt train. The effect is similar to a lighter flywheel, and the engine feels more lively and willing to rev.
GFB Lightened Underdrive Pulley Kit Include Belts 01-02 WRX/STI 98-03 Liberty
Regular price $299.00 Save $-299.00GFB pulley kits are designed to improve acceleration by reducing the rotational mass (inertia) of the belt train. The effect is similar to a lighter flywheel, and the engine feels more lively and willing to rev.
GFB Lightened Underdrive Pulley Kit Include Belts 99-00 WRX/STI 01-02 GT Forester
Regular price $420.00 Save $-420.00GFB pulley kits are designed to improve acceleration by reducing the rotational mass (inertia) of the belt train. The effect is similar to a lighter flywheel, and the engine feels more lively and willing to rev.
GFB Lightened Underdrive Pulley Kit Include Belts 94-98 WRX/STI 98-00 GT Forester
Regular price $420.00 Save $-420.00GFB Non-Underdrive Crank Pulley 94+ WRX/STI 98+ Forester 98+ Liberty
Regular price $205.00 Save $-205.00GFB have re-designed their WRX lightweight pulley to provide even more benefits. It is now shaped to look exactly like the factory Subaru pulley, so it goes unnoticed in your engine bay - it even uses the factory belts! A significant amount of weight has been removed from around the rim for even better throttle response. The pulley weighs in at 578g (previously 790g), compared to the factory 2180g on the WRX and 2575g on the STI. This pulley will improve throttle response (particularly off-boost response) and allow the engine to rev more freely in the upper rev range.
It suits all Subaru EJ-series engines, and does not require additional belts
GFB Lightweight Pulley Kit BRZ/86
Regular price $420.00 Save $-420.00This kit is supplied with 3 pulleys, not just for looks - the combined saving of 2.2 kg is significantly more than what is achieved by replacing just the crank pulley alone.
The weight doesn’t tell the whole story either - even though the saving is a significant 77%, the actual rotating inertia reduction (inertia is what counts) is 83%.
Like all GFB lightweight pulley kits, you can feel the improvements:
