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  1. 2nd Gen. 1&2 Series (2011-2021 | F20,F21,F22,F23)
    Hi all, I'm unsure which MHD stage 2 map to use for my car. The map options are: 91 Octane / 95 RON 93 Octane / 98 RON 95 Octane / 102 RON Where I'm getting stuck is the RON vs Octane dilemma. It seems fuel providers in the UK kinda mix an match quoting RON & Octane on their products. For...
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