I had my intercooler on before the 1+ maps were released. I felt a slight increase that was some what noticeable. After I switched to the 1+ map when released, it was a jump in power and throttle response for me. Also, depending on how you drive and the climate you're in, it's very beneficial. I recommend it for anything running more than stock boost honestly (even though not having one on stage 1 is safe).
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