BBC 8-Inch 12-1X Crank Trigger WheelOverview Upgrading to an MSD Flying Magnet Crank Trigger Kit will deliver the precise and reliable signal that a high performance engine requires. This kit gives you the ability to control timing electronically through a FuelTech). In addition, they are less prone to mechanical failure since there are no wear parts. With the included high quality timing pointer and the use of a direct bolt on, degreed balancer (see below list for recommendations),