I never had my GTO on the dyno. I had both of my C6's on it though.
The first C6 bone stock through paper air filters (Vette has 2 air filters) that had 25,000 miles on them only put down 317 rwhp. I dpon't remember the torque. After a tune it was in the mid 330's.
The second was a more typical 344 rwhp but it also had K&N drop in filters in place.
Most of the dyno's I've seen or heard about are on the low side 335 and on the high side 355 stock with the bulk falling in the 340-345 range.
Hope that helps.
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