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Old 02-10-2012, 02:32 PM   #2
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Join Date: Dec 2010
Location: Linden, NJ
Posts: 633
My Ride: 02M3T
I would recommend making a plenum. If you choose to use the stock airbox I have some recommendations for modifying it for boost.
02 M3 - Maximum PSI S2 turbo kit - 9.74@145.99, stock motor, stock ECU, first in the 9's
97 M3 - Maximum PSI turbocharged - 8.94@164.33, stock ECU, first in the 9's, first in the 8's
16 M3 - Breaking it in
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