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i work at a place that are very well know japanese imorters
both onwers have very hi performance r32 gtrs

one of them has one as a race car im not sure but he had similar problem with nolathane bushes

they are good but i dont think they last as much as factory rubber ones

this guy runs adjustable nismo arms thruoghout his race car

much better cause nismo arms still use rubber bushes but are stiffer than factory

u will find nolathane ones will always wear unevenly aswell

these guys get hard to find parts straight form japan
its easy for them sine they fly over to japan to the wrecking yard they work out of over there to see what to bring back

if u can post some pics i can show them ad they will know exactly what u have
as they sell parts for anything for performance japanese engines and parts