The blaster HVC is designed for high rpm, long duration applications such as road course and circle track racing using an MSD 6 series ignition. Works with electronic ignitions and MSD ignition Controls (ballast resistor required for points systems). Features 100:1 turn ratio and lower primary resistance produce high voltage output. Windings are encased in blue epoxy and secured with extruded brackets. Spark plug style terminal and threaded brass primary studs. Supplied with rubber shock mounts. Carb E.O. approved. Product Features:Designed for high rpm; long duration applicationsWorks w/Electronic Ignitions And MSD Ignition Controls100:1 Turns RatioLower Primary Resistance Produces High Voltage OutputWindings encased in blue epoxy and secured w/extruded bracketsSpark Plug Style Terminal and Threaded Brass Primary StudsSupplied w/Rubber Shock MountsCARB E.O. Approved