NGK ignition coils are manufactured to meet or exceed OE standards for the highest durability and operational performance, so they can be installed with confidence. NGK and their family of automotive products have over 80 year's experience and are driven by extreme dedication to innovation, performance and quality. Developed and rigorously tested in our ISO 17025 accredited test lab under the most extreme conditions, NGK's coil designs will outperform all others - far beyond operational environments a vehicle would actually experience NGK's coil housings are manufactured with premium thermoplastic and high-quality epoxy for superior dielectric strength and durability. Magnetic laminated steel maximizes voltage output and coil performance.