Well......take into account the authors note. Dont blow up your cars. Their are tuners out there that will send you OTS maps and tweak them for as little as $50. Also, Jestr Tuning who is local is getting into ecuflash for subies. He is very reasonable and good. I dont actually do the tuning myself, but it is good to know how to use all this even if you are just usings other peoples tunes.