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Have had two years on my 07 M8 162 with the cutler setup(73 grams primary yellow.sring,red cat spring secondary)it rips compared to stock,I run same elevation as you do. Climbs with any non-turbo 800.7700-7800 rpmsI think either setup(torsion or compression) can be made to work equally well.It comes down to what you know better.
I am used to the old cat clutch so thats what I am going with.