Smart ignition coils are ignitors designed into coil and ECU. The turbo had a nylon compressor wheel which enhanced the response even at better RPMs, as opposed to the ceramic wheel, which was inefficient at higher RPMs. This gave The brand new RB25DE extra power and torque at reduce rpm https://nissan-rb26dett-for-sale36036.thechapblog.com/28206052/nissan-rb26dett-for-sale-can-be-fun-for-anyone