 The HKS twin power dli ignition device has been the product of choice for those switching over to the AEM EMS. While not mandatory at the lower power levels (under 600hp) it becomes important as power levels and cylinder pressures increase. Regular price: $645.00 Sale price: $541.00 |  |  Almost mandatory upgrade is a GReddy 3 Row FMIC for your now single turbo car. Regular price: $1,778.00 Sale price: $1,600.00 |