I found this ecu kicking around in my garage and was wondering how to tell what the "jet chip" does to the stock ECU? Anyone have experience with this retro product?

 

I recently bought a S4 Tii with a N332 ecu with a Jet chip. I just replace that ecu with a stock N333.

I feel like I gained more torque under boost when running the stock ecu and overall seems to be running better.