Let us use our years of dyno tuning experience to create a mail order tune for your 2009+ CTS-V. Our performance tuning for the supercharged V8’s typically yields 20-40rwhp depending on your modifications! We spend a lot of time working on the part throttle performance as well, making the car much more responsive and efficient. We can mail order tune for almost any set up, and take advantage of any modiifcations you may have added. If you wish to come to us for a dyno tune after purchasing a mail order tune, we will apply what you’ve paid towards it! Please keep in mind, the automatic CTS-V’s have a transmission control module that is part of the transmission, so unless you purchase an HP Tuners email tune from us or have it tuned in person, we will not be able to make transmission changes during the tuning. After placing your order, please fill out an order sheet for your vehicle (here). What program should I use and what is refundable? Click here!