Latest technology! SR20DET compatible high-power ignition coil with new multi-spark function is now available! It is a high performance ignition coil that changes the number of turns based on the R35 coil and further generates 4 multi-sparks in the low and medium rpm range to significantly improve ignition performance. The R35 coil cannot be bolted on to the SR20 engine, but a new coil case has been developed to allow a perfect fit for the SR20 engine. The S13 and S14 come with a dedicated harness so they can be controlled without a power transmission. It is possible to use a genuine ECU, but if you use an ECU that can change the dwell time, you can expect further power up.