Hello, I have a happy knob that i bought from ydtrack (clubgp) several months ago, along with the DHP. I have sold the DHP and now am looking to sell this knob. It isnt a ZZP happy knob. Instead this knob has two small dials to set two different values for timing. There is a switch on the box that switches which dial it uses. So you can set one dial for 20* timing when your at the track with race gas, and set the other to 15* when your just driving around town. All you have to do is flip the switch.
The only disadvantage to this happy knob is that you must use a scanner to watch your IATs as you adjust the dials. If you miss the necessary number (ie 60* and instead have it at 62*) it will set an SES light about your IAT. All you need to do is properly set the temperature.
If you have any questions, please ask them. I am looking for $30 + shipping
