Well, its pretty much a known fact that stock for stock, M6's are superior in pretty much every way except maybe convenience. However, when you're getting into the bigger #'s and higher HP/Tq ranges, which would be better? Im talking about the 7-800rwhp/rwtq kind of power. Been hearing that it is "dumb" to be racing with those kind of numbers and shifting gears manually....

 

From what I have taken in (could be wrong though) with a stick you will put down better hp and tq numbers but if it is a track car you could probably get a better et with an auto because you have a less chance of driver error. You will want more opinions then mine though this is just off of what I have learned.

 

Agreed. If it is purely 100% track car, auto would be your best bet, but don't plan on driving daily with a massive stall converter.