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      12-10-2012, 12:05 AM   #4
shaginwagon13
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Drives: BMW 335i Coupe
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Quote:
Originally Posted by nitehawk View Post
Hmm, what's the cell density of the stock secondary cats?
I think the cell density on the stock ones are around 600 cpsi. For comparison, high-flow cats are 100 - 200 cpsi.