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Finnish mack guy

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  1. Finnish mack guy
    i have a mack etech 12litre with 480horsepower originally. No i have changed eup:s and injectors to bigger ones and an holset hx55 turbo. We made a new software to it on a dyno . Now it's pushing 611rwhp 3110newtons on 1600rpm. The difference is outstanding and performance and fuel economy is better

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