MSD Blaster HVC ignition coils are designed for high-rpm long-duration applications such as road course and Circle Track racing using the MSD 6 Series ignition. These units feature a 100:1 turns ratio as well as lower primary resistance to produce high-voltage output. Windings are encased in a durable epoxy and secured with extruded brackets. They also feature a spark plug style terminal and a threaded brass primary stud. These ignition coils are CARB EO-approved and are supplied with rubber shock mounts to help them resist coil vibration. Equip your performance vehicle with an MSD Blaster HVC ignition coil and feel the power!