Should take you about 3 hours to do the speakers and about 2 hours to do the sub. Here are the installation guides so you can see what is involved in the process.
X108 Subwoofer System Installation Guide Non DSP
X108 Subwoofer System Installation Guide W/ DSP
X5 Stage 1 Speaker Upgrade Installation Guide
Also here's a Stage 1 install video guide.
http://www.youtube.com/watch?v=y25x6gIIgPE

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[size=1]Paul N. Wielage
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Bavarian Soundwerks | Audio Solutions for YOUR BMW
www.bavsound.com | p: 404.963.8857


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