Originally Posted by isis
Does this warm you up any?
We upgraded this CTS-V with a new Hennessey blower pulley and a reflash and it came in with a Corsa axleback.... A little blip of the throttle and it makes all this beautiful noise. Hennessey claims it should make around 580-590chp at this point. I think we might have to go for a ride with the owner tomorrow when he picks it up