Hello! I’ve been looking into building my Celica 7AFE and getting a custom fabricated turbo kit with a tune. I’m stuck on the details of how a stand-alone ECU works exactly and which ones to buy? They vary in a lot of prices and I’m not sure the differences. Does anyone know much about the stand-alone tuning and differences?

submitted by /u/jacesongahl
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Source: r/Celica