Aluminum UD Crank Pulley for Porsche Phenolic Intake Spacers by adding coin slots

by adding coin slots

Cup mouth: 8

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Aluminum UD Crank Pulley for Porsche Phenolic Intake Spacers by adding coin slotsThis Lightweight Underdrive Crank Pulley is made of 6061 Aluminum, and has a 20% accessory reduction. While the stock crank pulley is made surprisingly light, the smaller diameter of this pulley allows the rotational mass required to turn it to be only two thirds of what is required to turn the stock pulley. While this gives a slight increase of power, the majority of the increase will be from the under driving of the accessories. The pulley is 20%