Thread: 135i step with blow off valve
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      01-07-2013, 09:30 AM   #6
1thirtyfizzo
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Drives: E93 335i and E82 135i
Join Date: Apr 2012
Location: Pennsylvania

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I have bov w/ steptronic and you can only hear when u let off the throttle. Usually sound loudest in 3rd gear.
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