ZPE (the company behind the GripTec pulley system) has their own mounting "hub" (the ZPE hub) that provides a standard mounting point for GripTec pulleys to a variety of supercharger systems.
The ZPE MKII hub is designed to allow for the smallest pulleys possible on factory vehicles. A Griptec upper pulley upgrade is a cheap and effective way to boost power.
The hub comes with a set of 8 titanium M5x.08 screws for weight savings and strength while mounting your blower pulley.