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      01-10-2013, 08:06 PM   #24
BQTuning
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Drives: 2012 Z4 sDrive35i M Sport 6MT
Join Date: Nov 2010
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Quote:
Originally Posted by BAL278 View Post
Mr. 5 did a thread on this.. The stock airbox is the best but as Jeff from topgear said it becomes more restrictive at higher boost levels.. You can build a Mr. 5 intake for like $50 with parts from Home Depot
See above answer to the STETT CAI
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