Twin is for amatuers.

Put one on every cylinder:

 

it's been done with the srt-4 two small turbo's or semi-stock turbo's. it failed hardcore. i would assume doing it to the turbo cobalt would be the same thing. adding a bigger turbo that doesn't take long to spool would own a 2 small or mid size turbo's.

 

Supercharger and turbo vs two turbos is not apples to apples here. Turbos are way more efficient than superchargers.