Yeah, I am pretty sure that 12.5 is incorrect. I guess it may be possible but this car is essentally the same as the Pontiac G8 GT/GXP and those cars run mid 13s for the GT (6.0L) and low 13s or very high 12s for the GXP (6.2L). I have a G8 GT (A6) with a CAI, headers (stock mufflers), and a tune and it has run a best of 12.58 @ 110mph. That was in great weather and has run a best of 112mph trap speed. I doubt you could see 12.5s stock in the VXR8.