How do you tune a Z-car?

RDGR12

I can vouch for Cobb. I used to drive a 2005 WRX (which I had to sell unfortuntately) and I bought the AccessPORT to accomodate my modifications, commonly known as Stage 2 (turboback exhaust + AP) in WRX.

It is of good quality and functionality, especially, with the new 2nd version of AP (it used to be a size of a huge brick). You can bring in your car to a professional tuner authorized by Cobb (simply means they tune using the Cobb AP). They upload the custom map in to the ECU via AP.

Another feature I love about AP is you can store multiple maps; load and switch in to your ECU, whenever you need to.

It's quite a useful, very convinient device. Cobb offers "off-the-shelf" maps which is very conservative. But, at least, once you install the modifications to your car (within the parameters of the description of Cobb setup), you can take it for a spin safely, for the glimpse of what is to come after the custom tune.