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The ESS tune includes DCT programming to increase clutch pressure afaik.
Wider tires don't offer more grip. They just look better, increase unsprung mass and last longer. If you want more grip you generally need a different (softer) compound. Width doesn't matter as much as people think.
As for the other questions, please check my build thread on spool street under the Z4 section.
Last edited by Asbjorn; 03-27-2018 at 01:27 PM..
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