Dustin Pollock

I've been looking at a pre owned 2011 Audi s4. It was a trade in at a Chevrolet dealership. It has some type of modification to it, but I'm trying to wrap my head around what it is. All the guy at the dealership said was its "stage 2" and it has something to do with the supercharger. I'm thinking its the ECU stage 2 upgrade. It also had a LED readout on the middle console that goes green red or off. Any info would be greatly appreciated as I know nothing about this stuff!

togatown

Stage 2 is an ECU upgrade combined with a different size supercharger pulley. Could be any one of several vendors. Also sounds like it has some type of boost gauge installed.
Might be a grenade with the pin pulled, waiting to go off. GLWP!