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  1. Question about octane and Water meth injection

    Performance Modifications
    Hey! Next week I'm installing my stage 3 parts + cooling mod on my Redline with a 2.8 pulley. There is just 1 thing that I'm still not sure .. everyone say that I need to run at least 93 octane with stage 3 and 2.8 pulley but in my city there is no 93 octane. I can only get 91 octane. What...