I came from a 2013 SHO that I had a CAI and Livernois 93 Octane since 500 miles and turned the car in at 28k. Anthony switched vehicle support for me no charge and I loaded 93 Octane Performance/ 93 Tow, 91 Octane Performance/91 Tow with 100 miles on the Sport. I just received my Thermostat and 3 bar map sensor. I am installing them next week along with the tunes. I could not imagine driving the X Sport without a tune. Stock is a dog, unlike the SHO it was pretty decent stock. The Sport wakes right up and turn off traction control you will be spinning wheels. I like how the tune prevents auto shifting in manual mode. On the SHOs they would autoshift even in manual mode, and often I would get a 1-3rd shift. It was so bad I stopped using the paddles. Not now, this Sport kicks ass. I can't wait to see the tunes with 3bar.