Chris Wiltshire Posted December 17, 2016 Share Posted December 17, 2016 Hi, Im thinking about changing my final drive to either a 3.9 or 4.08. Has anyone from this forum done this? What do you think? I've heard that the 4.08 can throw off rev match, but I've also heard that this can be adjusted via ECUTEK? Is this correct? I'm already running ECUTEK so would be handy! Seems like a good mod to liven up the zeds according to the us forums! Quote Link to comment Share on other sites More sharing options...
Commander Posted December 17, 2016 Share Posted December 17, 2016 Haven't done it myself, but similar ratios are available for the e46 M3 which I considered for a while. Ultimately it depends what sort of driving you do? Sure it'll make it feel more lively lower down the range, but it costs you on cruising rpm being higher, lower vMax, more gear changes, etc.. Quote Link to comment Share on other sites More sharing options...
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