hello everybody. i have a 2002 v6 mustang and right now it is completely stock. i'm wanting to dual out my exhaust and add a flowmaster also. i was wondering if anyone knew what size inlet and outlet i would need and any helpful hints or suggestions would be great. i am also thinking about putting a cold air intake on my car and i'm open to any other improvements that are simple to make that will help with horsepower. all help is appreciated.