Click into this link.
http://www.hks-power.co.jp/products/electronics/tenka/twin_taiou.html
Check your car for the model. My Twin power is DLI. Which will fit S13 SR20DET, S14 SR20DET, R32 RB26DET, R33RB26DET and RB20DET.
I have the full harness that plug right into the S13 SR20DET, don’t know if it will fit other models.
Thanks