They are all correct. Your car will run just fine with the STILLEN Gen3's and Cat-Back Exhaust. If you add on Headers and HFC's (or Test Pipes) you should get a tune. A tune on the setup you talked about though will help it run at its best but it is not necessary.
Contact me directly here at STILLEN if you are planning on picking up those parts. I'll see what kind of deal I can get you
