| The s100 is a small circuit which fits inside the ECU. It uses the same ROM file as the s200, and has the same features less datalogging, full throttle shift, launch control. |
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| The s200 is external to the ECU, controlling datalogging, launch control and full throttle shift via connectors. The s200 can be calibrated with either Romeditor3 or Romeditor4. |
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| The s300/s300j is a circuit board which fits inside the ECU it offers boost and datalogging. A slot is cut in the side of the ECU for the USB connector. |
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| The K-Series Programmable ECU (K-Pro) consists of a hardware modification to any K-Series ECU, which allows you to re-program the ECU and datalog sensors. |
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