Tim's pushing like 650 HP/TQ.

Thats a lot more than you are getting out of a stock CTS-V engine. Even with a tune and intake/exhaust. Sorry. You're crazy to think they are that close.

 

Heck, I even doubt a V can get that kind of power to the ground without resorting to NOS or a different power adder. ZR1's have bigger S/C's and better oem "mods" and I know they can make WELL over 650whp with bolt on mods but I have yet to see a V do similar. Plus, the V is almost 1000lbs heavier than the G...YIKES!