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stock fuel system

  1. 3.0T
    With FBO + tune what is the max E% you can run on the stock fuel system, what about with just LPFP? after doing every bolt on i want to run E30-40 with flex fuel. But would prefer to avoid HPFP if possible. AMS said need HPFP and LPFP but I believe they where talking for E85.