I did 6/6 f/r and when I spoke to Josh and Murray at MCA they proposed a minimum of 7/6 for a compromise of track and street.
If you are looking at getting serious with track work, then they recommended 8/7 as a minimum, not too sure how this would feel as a daily driver.

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2015 Forester XT Premium
2020 VW Tiguan Allspace
teejay: If I wanted a comeback Id wank in front of a fan