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      02-17-2011, 07:54 PM   #10
Diver
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Drives: Black '12 135i - Sold
Join Date: Nov 2010
Location: Texas

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You can tune anything, but the turbo four ships with 1.2 bar of boost as compared to the N55 with .6. That should tell you that BMW has not left that much on the table for the tuners to play with.
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