We have a love of Cadillac's here at CT Performance. Both of CT's owners have a V2 and street drive them. Additional they've been known to push them to their 1/2 mile and standing mile limits. The fastest we've gone in a CT V2 is 214MPH and customer cars have made runs for the standing mile record (without success.... yet).
That said if you're looking to change the sound of your CTS-V, add some power or even just change the stance we can surely give you a hand.
Customers purchasing any stage in our performance ladder receive a custom built tune for your specific setup - street tested for drivability and verified for power both before and after our modifications.