Ok, I have a 240sx with an sr20. The problem is that the speedometer doesn't read the mph right or something. I was told that the problem was the speed sensor that is in it is the sr20 one and is reading in km/h and I need the ka24 speed sensor to read it in mp/h. The speedometer basically when I'm going like 20ish it's way above 20 more like 35-38. The question I have is wtf do I need to get the speedometer to read correctly, the ka24 speed sensor? or what? Also, if that is the case where can I find one or where can I find whatever part I am needing.