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01-27-2013, 06:39 AM
Drives: 2009 135i white on black m
Join Date: May 2012
The synapse is the better valve because it has a piston type bov. The others are a diaphragm type bov. A diaphragm type valve reacts slower because of the stretch of the rubber. watch the video and it will explain.
Last edited by Hellkite; 01-27-2013 at
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