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GrimmSpeed Lightweight Crank Pulley Black - 15-20 WRX / 13+ BRZ

The Grimmspeed Lightweight crank pulley has been designed to improve the performance of your vehicle. This particular crank pulley has a 75% reduction in rotating mass when compared to the factory crank pulley, and has been fabricated from 6061 T6 aluminum. This is a direct replacement of the factory crank pulley, and once installed you will get a little improvement in performance, especially since the factory pulley has a mass of 4.90LBS, where the Grimmspeed unit has a mass of 1.15LBS. . . Show More >




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