100% pure copper windings in primary and secondary bobbins improve durability and provide higher resistance to internal shorts and dielectric breakdown. Electronic ignition module profile and feedback signal ensures proper OE fit, form, and function. Thermoplastic housing withstands heat stress for enhanced durability. Internal core made from grain-oriented electrical steel limits loss factor within magnetic circuit to reduce heat that may reduce coil endurance. External core made from oriented silicon steel ensures durability and longevity. Stainless steel spring resists corrosion. Tin-plated brass terminals improve electrical contact and protect against corrosion. High-dielectric epoxy injected into case and pulled into vacuum to eliminate air pockets and prevent moisture intrusion or thermal breakdown.