NGK ignition coils are manufactured to OE standards for the highest durability and operational performance. These coil designs are developed and proven tough in an ISO17025 accredited test lab at extreme conditions that are far beyond any operational environment a vehicle would experience. Custom NGK ASIC (Application Specific Integrated Circuit) chipsets optimize efficiency for today's complex systems and prevent component damage. High-quality electrical steel coil lamination provides maximum efficiency to produce the best possible spark. Vacuum-sealed high-quality epoxy resin ensures proper installation and long life while a shellac winding coating resists voltage arc and component failure. The high-grade dielectric thermal plastic prevents failure resulting from extreme temperature variations.