Hi, I’m looking to get a better sound out of my 07 mustang gt as well as a little more kick. I’m buying a 3 month-old flowmaster exhaust system, performance headers, and an air intake system from a friend. I was wondering if after i install these parts I’ll have to tune my car to get any benifit from them, and if so how much would it cost to do so. if anyone could help me out I’d appreciate it. Thanks.