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      09-28-2019, 04:28 AM   #2
Delta0311
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Drives: 2011 BMW 335xi E92 2016 228xi
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In scientific terms...


The cell count of a catalytic substrate refers to the number of holes per square inch and is a direct indication of the flow capabilities of that substrate. The lower the count of holes the bigger the hole need to be to fill one square inch, a bigger hole subsequently flows more exhaust gasses.
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