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      01-11-2017, 07:15 PM   #18
SeanWRT
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Drives: E90 M3 & F87 M2
Join Date: Sep 2015
Location: Shanghai

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Quote:
Originally Posted by kiysersosae View Post
So the factory cat is 400cel....so, is a 100 cel reduction worth it, I'm not sure now. I think going with the richter 200cel for UK guys would be the best option, especially if you have the function to clear cel codes
kiysersosae,

Stock cat is 600 cell, below is a HJS 300 vs stock 600 comparison picture. What's more, metallic cats provide even more flow at any given cell count than ceramic counterparts that 99% of stock uses, because cat wall can be made much thinner, allowing for greater effective diameter.

Check out more from my review on HJS DP here.
http://f87.bimmerpost.com/forums/sho....php?t=1339166

Sean
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