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      07-04-2011, 07:21 AM   #4
ysv
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Drives: E92 M3
Join Date: Dec 2008
Location: Moscow

iTrader: (0)

At first i had only back section, the sound improved at that moment a lot. It is quite a great difference between only back section and full system. Start with back, then, if youd love it, continue with x-pipe and downpipes, the quality of the sound will be the same, but the volume, good luck!
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