Multipack Ignition Coil Kit for a complete replacement of old and worn ignition coils. When one ignition coil fails, you should replace all of the ignition coils with a new set because one worn out coil means the other coils have been subjected to the same extreme heat, stress and wear. Our ignition coils use 100% pure copper windings in the primary and secondary bobbins to improve durability and provide higher resistance to internal shorts and dielectric breakdown. Our premium ignition coils consist of a special blended formula for the best performance, longest life and better heat dissipation. A full E-Lam core of silicon steel and solid brass high voltage terminals protects against corrosion. Our ignition coils are built for maximum output voltage.