NGK Ignition Coils are manufactured to precise specifications for the highest possible durability to meet and exceed all OEM performance standards. Developed 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. Designed to function seamlessly with vehicle ignition systems, only NGK ignition coils feature our custom NGK ASIC electronics and exacting OEM fitment & connectivity.