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      11-15-2012, 03:59 PM   #46
gangzoom
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Drives: E90 335i M sport
Join Date: Jun 2011
Location: Leicester

Posts: 1,118
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I noticed a howl/noise from my turbos after having AR design Hi-flo Cats installed but have to say its no where near like the noise in first post, also running JB4 and Forge intercooler. No smoke or reduced performance (quite the opposite infact )

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