Hi everyone. New here...Just picked up 2016 ST with only 2200 miles on it. It definitely has Roush cat back exhaust on it. It also has some type of BOV on it as it hisses at every shift regardless of RPM. What I want to know is how do I tell if there is a tune on it? Just not sure why someone would put these add-ons on the car only trade it in with 2200 on the odometer. I haven't had a chance to crawl under and see if there possibly a DP on it or not. (my guess is no). Also, is there anything else I should look for as far as mods go? Thanks in advance for the info!!!