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ird hi m8 first of all the pulling power has changed a lot, my dad has just had his x5 3.0 sport done last week and had it serviced a few days ago bmw didnt pick up and it still pulls hard, i think dms gets the best bhp but to many bhp is a lot of strain on the turbo and engine so i went with superchips which give a 5 year warrenty with it to
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