Hey Max, 1 7/8 headers and a 3 in exhaust seem really popular some go 2 on the headers if they are going to be creating a fi monster. I went with 304 stainless... Hard to beat Ted over @
Jannetty Racing when it comes to tuning. No one has done more tuning on these cars than him. All done through email and a hand held tuner. He is a car guy and will spend time on the phone with you as you try to decide how to bring your vision to life.