It's never too early to talk about the SEMA show. GM is the first to peep about their plans and has handed aftermarket performance product manufacturer Gravana a Cobalt SS Supercharged coupe to get twin-charged. Gravana will bolt on a turbocharger along with the supercharger to create a 300 horsepower monster. Now if only GM or Gravana can add the AWD system from the WRX, the SS could take full advantage of the boost.




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