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I can see you are a staunch supporter of Race Chip. Maybe even affiliated with the US distributor? ; - )
I like the concept and I know in Europe its popular. I've only seen 2-3 members talk about RC that's all... even fewer with N63s... more really on N55s.
RE $600... who's selling it for that? RC-USA is $645 for Ultimate for N63 550i.
And a E60 525i... that was not worth tuning... the story around that purchase will require some scotch and a nice roaring fire...to comfort me on a catastrophic buyers remorse.
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