I think that saleen retunes the computer, Because on the gauges it sayes use premium fuel only. So I think that they must do something with the timing. I have a stock motor for now. I have BBK long tubes and and off road X-pipe with a Accufab upper intake and 75mm throttle body. I also have 42lb injectors and 03 cobra Tank and pumps for the blower. Do you think that i will have a problem with the t trim with the stock motor? I am also running a intercooler. I just did not want to have to get a new head unit in a couple of years when i have my motor bulit. Thanks for the help!