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  1. Infinity Design long tube headers - review, dyno graph, Dragy runs

    E60 M5 and E61 M5 Touring Discussion
    Always has bother me, does all the LTH on the market could makes really a difference comparing to the budget option of just de-cated stock ones?! Unfortunately there is not much back to back comparisons, or actually not at all, of a decated to LTH. It has been some time that I was having...