Is the WC on the ECU black or red? Black = Late model Zenki SR. Red = Early Model Zenki SR. Reds are more common, use a square clip MAF and black are a little more rare with an oval clip MAF. No difference other then that.

NA is a kouki S14 SR20, and I don't know what the S15 SR ECU is.

WCs aren't rare as they were made from 93-96. Certainly more rare then Red Tops, less rare then NA S14 SRs. Basically there is no difference between the WC and NA S14 SRs except kouki SRs have cooling fins on the head and zenkis don't.


Good luck with your sale I just finished my swap. Not saying anything bad but that price is a bit high as well. You may want to let your friend know.