Welcome. We are a growing family of nerds that believe in being the underdogs.
Anyways downpipes, intakes, plugs, and a JB4 will get you up to speed quickly. I don't think there is much debate any longer between the JB4, and other piggy back tunes. The JB4 gets you the most you can get from this car.
A few things to note are... sorry to burst your bubble, but the AWD version actually doesn't do better lap times than the RWD believe it or not. Basically your AWD stinger has a lot more weight than the RWD. What does that mean? That means you will probably benefit from
mods more than RWD does. But completely stock AWD doesn't mean much. People are going to debate this, but I at least said it. Get some
mods on it and you will benefit from them better than it's RWD counterpart.
To get you up to date on the downfalls of our platform atm... This car is notorious for fuel pressure issues. They are currently still working on an
aftermarket workaround for our fuel system, but could take some time. But that puts us at around 500whp maximum for the moment. Do NOT run full e85 on this car due to what I just stated. You can run up to an e30 mixture, but no more than that. I know all your friends are probably all running e85 in their cars and they are fine, but the fact of the matter is our fuel system is the bottleneck at the moment.