the gain in bushings is most realized when going from shitty worn bushings to stiffer new ones
brand new stock to upgraded bushings is a minimal improvement that i would table for much later
he isn't some race car driver out to get every fraction of a second, so his dollars are better spent on . . . .a coilover and adjustable arms
bushing replacement is also a labor intensive job. You're dropping a subframe and removing bushings, possibly with fire (yay!)
A brand new Z with the sickest, upgradiest bushings STILL won't have front camber adjustment or height adjustment, for example
Fixing the much more obvious and impactful flaws is a higher priority than something in the margins
This is like being served a really shitty steak dinner. A prettier table mat might make the experience slightly better, but . . . you've still got a shitty steak dinner.
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