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      05-19-2008, 04:26 AM   #46
jjbirch
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Drives: E60 530D M SPORT
Join Date: Feb 2006
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i think your worrying about this a bit much a tuning box takes the turbo lag out like when your in second and 3rd its a little pause then bang on comes the power smoothness is still, but what i can see the tuning is a self install and you will have to plug it in, so it must be easy to take out, whats the worst that could happen you dont like it so take it out,