Sam,
This may sound simplistic but: -
Would you consider using something like a Racelogic Vbox to do a 0-60, 0-100, 80-120 , 1/4 mile times etc for these types of upgrades. I think it would be fab to have these done for some of the turn-key packages you will be doing, so the average joe can get an idea of the improvements in performance these packages will provide.
i think not only from an interest perspective, but from a marketing perspective it might make some sense. I know id love to know!
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