MSD built the MSD Ignition Coil – Blaster Series – High Vibration to thrive in the toughest conditions. Whether you’re running off-road, in marine environments, or on the track, this coil delivers reliable, high-energy spark while standing up to punishing vibration. MSD encased the internal windings in premium-grade epoxy inside a rugged metal canister. This provides for a completely sealed primary and secondary windings and protects against high- and low-frequency vibrations.