Thread: Three-Stage Intake Manifold N52B25 - 323i
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      05-09-2010, 03:08 PM   #16
wareagle900
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Drives: 2006 BMW 330i
Join Date: Aug 2009
Location: South East Alabama

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If i removed the primary cats and left the secondarys and muffler, would this be a huge sound change?
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