It might be hard to imagine how reducing the mass of a pulley makes a car go faster, but accelerating a heavy factory pulley from say 3000-7000 RPM in a second or two saps a measurable amount of torque. GFB Lightweight Pulleys reduce inertia by up to 85 percent, so most of the torque that used to accelerate the pulley can now be applied to the wheels.

This Part Fits:

Year	Make	Model	Submodel
2013-2016	Scion	FR-S	Base
2013-2020	Subaru	BRZ	Limited
2013-2019	Subaru	BRZ	Premium
2015	Subaru	BRZ	Series.Blue
2019	Subaru	BRZ	Series.Gray
2016	Subaru	BRZ	Series.HyperBlue
2017	Subaru	BRZ	Series.Yellow
2018,2020	Subaru	BRZ	TS
2017-2020	Toyota	86	Base
2018-2020	Toyota	86	GT
2020	Toyota	86	Hakone Edition
2017	Toyota	86	Special Edition
2019	Toyota	86	TRD Special Edition