Right now there is nothing being used to tune it, hence why I drive it like a baby. It doesnt go over 4500 rpm's and its only boosting 9PSI. I can get you a killer deal on an SAFC1 for $100. It has a 1g CAS swapped in and it never threw a misfire code, only the code for no cat. Now it has codes for EGR and I believe MAP sensor as well, but still no misfire codes.