640 vs 650
Has anyone tried the 640 and felt it would be enough power? It can actually travel more than 400 miles without a fill up.
i like the idea, but really when your cruising down the coast, does one have to have at least the 650?
03 M5/ 02 540/ 01 M5/ 00 X5 4.4/ 99 M3/ 95 M3
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