You will want everything. Sensors are addictive. And they are legit. When you have a transmission problem you will look at your pressure etc. I had 22 on the Avenger and wanted more. Now they have tire temp, track temp (I didn't have those). Here is a real life case of why you want sensors. My Neon had fuel pressure for the nitrous system. So if I would have looked at my graph I would have seen that the fuel solenoids weren't opening. There would have been a blip there (or should I say lack of one). I damaged my engine and the Racepak would have saved me.