How much would a factory pcm be, how much are the mopar pcms? What kind of performance gains do you get from the mopar performance pcm? Will it affect the gas mileage at all? I think i need a new computer, and if i do i wanst sure which one to get. I plan on selling it soon so if the mopar pcm is alot more than i can get a factory one for, ill just get the factory pcm.