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Originally Posted by X5Flyboy
I did the whole S2 upgrade on my 2001, which included alot more than what's offered for the 2004-2006. I had a 2006 for awhile. had planned for the strut brace and cold air intake, but was also seriously looking into the tranny software to do something about the acceleration hesitation. I know alot of people say Dinan is too $$$, but I also know there are alot fewer headaches when everything is designed to work together and only having one source to complain to if problems arise (which I've had absolutely none)
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agree. dinan's benefit of covering the warranty with bmw is excellent. and no doubt they build quality products but my point was that the $$$ is high for a small or negligible benefit in performance. at least that was the case in my 540, might yield better results on the x5. ymmv as usual.