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That is amazing!! In all my posts and vids i have strongly supported bms stage 1 tune once i installed it. I can definitely feel that huge gain in power. Iam currently using 94 octane fuel in my 320i and running the default tune setting. Iam averaging 730km a tank!!! Cant wait for the stage 2 kit. What type of fuel will we have to use?!? Back to the piston head topic, is the piston made of the same material and just a slightly different shape to up the compression? 266hp is a lot on the engine. Iam not sure how stable it would be on the rest of the drivetrain.
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