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Ok Lots of posts on the aftermarket equip. I intend to purchase a 2SS at some point and I have not read all the posts on this thread so apologies in advance if this is has been asked and answered or is just a dumb question. With these GM accessories will it be possible to order the car with these "Performance Parts" or will it be strictly an add on that you have to purchase in addition from the dealer and change out yourself or pay them to change out?
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