Now that you have received your Lightweight Crank Pulley for the Porsche 996 or 997, it is time to install it.  The installation is pretty straight forward.  There is a slight difference in the below compared to what you need to do.  Since we supply the pulley with a tool, you do not have to loosen 1 axle.  The reason this was done was to make it easier to loosen the crank bolt.  The pulley tool fits in either side of the crank bolt hole to allow you to hold the pulley in place from spinning.  Once you loosen the crank bolt, just pull the pulley off and replace!