Standard(R) Blue Streak DIS ignition coils use pure copper windings in both bobbins to improve durability and provide higher resistance to internal shorts and dielectric breakdown. Standard(R) Blue Streak coils can run hotter without breaking down. A full E-Lam core of silicon steel and solid brass high voltage terminals protects against corrosion. Standard(R) Blue Streak DIS coils are built for maximum output voltage. As a global manufacturer of original equipment ignition products, we maintain complete quality control throughout the manufacturing process from componentry to finished product.