I have a 2013 stx with the 5.0 in it. I have after market exhaust that is cat back. 3" that goes into a magnaflo muffler that's single inlet/dual outlet 2.5". I have a sct preloaded programmer. I going to put a CAI on it but was wondering is afe better than k@n and go with the 85mm or 90mm throttle body for it. I also want to put some shorty torque tube headers on it but, what do u think would be the best way togo to get the most hp without droping a lot of money.