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ok ..so my friend has a 2013 328 sport. basic sound . We want to up grade the sound a little. What size are the door speakers? is it a simple plug n play? any extra work involved...nothing crazy, just basic.... ?
Thank you in advnce.
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2020 X6M Competition // Donington Grey // Executive Package// Bower and Wilkins Sound System // Driver Assistance Package // CF Trim
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