The SRT-6 uses a computer controlled electric clutch on the supercharger stock. At low power levels, the computer disengages the clutch just like your AC compressor. Kick it down, and instant lock up via computer control, and boost is there.

To answer the question, when the supercharger is not engaged via the clutch, air gets through either by internal passages or simply freewheeling the compressor vanes. A turbo would simply blow through with a disengaged clutch without trouble.

If you are blowing 5 PSI in, the supercharger is going to add it's additional boost on top of it. The AMG engine is already pretty strung out as far as HP per litre output, and there is some room for more. However, 13 lb of boost may be right at the limit.

STS does not produce a turbo kit any where near what you would need. You would be custom from the get go and they won't do it. You will also need supplemental ECM control, additional fuel injection, and additional intercooling capability. Not to mention all the dyno time and fabrication work.

If you want more HP, then just go with the RennTech pulley and ECM package, and slap on a better exhaust. It will be far cheaper, certainly easier, and more reliable in the long run.

But it could be done for the right amount of $$$.