the cps was by far the best upgrade i have done to my car, audi's tend to run hot in general and can handle the heat but living in the south, Atlanta, it gets really hot like in texas and the car will throttle back the power to keep from overheating and especially if you are in traffice a lot, that thing will be running way to hot but since i put the apr cps in, i can run wide freakin open all day even if its 110 degrees. it dropped my coolant temp 20 degrees and stays down, 195-200 degrees and my intake air temp is on average 40 degrees celsius and thats on a hot day. its definitely worth the money cause thats a nice car and if you are getting more power out of it then you gotta protect the motor. it is very difficult to install, about a 2 day job for a trained tech.