BMW 3-Series (E90 E92) Forum - View Single Post

taibanl · 02-04-2012, 12:16 PM

The bsw stage i is a speaker upgrade. Nothing more. If you want to upgrade the base system you have more work to do. One of The cheapest would be the oem alpine upgrade

02-04-2012, 12:16 PM	#149
taibanl Brigadier General 281 Rep 4,121 Posts Drives: BMW Join Date: Sep 2010 Location: NA iTrader: (4)	The bsw stage i is a speaker upgrade. Nothing more. If you want to upgrade the base system you have more work to do. One of The cheapest would be the oem alpine upgrade
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