I know both big companies have that option, but what is the purpose? Is there something that can't be covered in a basic flash?

 

It rewrites the operating system in addition to the calibration.

 

IT also allows you to make a compatible computer into another. For example,

a 99 silverado Pcm into a 2002 z28.

The Biggest thing that we like is the Custom operating systems that are being made, so we can use a factory computer to run our big engine combos. That requires a full rewrite of the pcm.

 

also you can use itt o upgrade to later OS's and custom Operating ssytems

 

I knew EFI used theres for the Custom OS's I just wasn't sure what else it could be used for.

 

keep in mind it can also be used to fry your PCM... hence, only use it when absolutely necessary as mentioned above.

Chris...