Well I am not sure if that is definitely something that has to be done, but I talked to a few shops that deal with cars that have been modified and they said that since there is more air going in and out that the computer would be a little screwy and recommended a tune and after market fuel pump to support the modifications that have been done. Like I said it does run and runs good just not something that I would drive on the street daily. When you get into the throttle and then let off when there is a load on it the engine RPM drops right down and then it will act like it is going to die. I could not have it timed right, I am not sure. But if you have any pointers that might help me get it running better that would be greatly appreciated.