Features To improve the life of the coils, mounted the ignition coils away from the plug holes where the heat source is. For more efficient and steadier ignition, you can upgrade from the simultaneous ignition system to the sequential ignition system by installing the kit on the 2JZ-GTE VVT-I engine. The black anodized brackets to ensure aesthetics and durability. Made in Japan for high durability and performance. OEM harnesses that have deteriorated can be replaced with the included specialized harness. Easy bolt-on installation with specially designed bracket and harnesses. This is a kit for the 2JZ-GTE turbo engine only and cannot be installed on 2JZ-GE/ Each coil contains built-in igniter, so the original igniter which is at risk of failure after years of use can be removed. It has the highest output energy in the industry of Japan. Even in the event of overcurrent due to ECU trouble, the current limiting function prevents immediate damage to the coil. Cautions Use an ECU that can adjust the dwell time for control. Modification is required when using this product with the OEM spark plug cover. Optional Carbon Timing Belt Cover (45999-AK028) is available for the 2JZ-GTE with VVT-i. To get the best performance out of this product, we recommend the "HKS Super Fire Racing Plug" which has excellent wear resistance. Separate terminal kit (4299-RA009) purchase required for the 2JZ-GTE with VVT-t controlled by F-CON v-Pro.