With the K Swap becoming more and more popular with rear-wheel drive chassis, it was only a matter of time before a trusted solution became available. The Rywire K Series Conversion Harness for the 2000-2005 Honda S2000 is exactly what you need to make the under dash harness compatible with the Hondata KPro ECU on your K20 or K24 swapped S2000. The conversion harness is also compatible with AEM EMS.