masyado daw matigas ang polyurethane bushings for normal driving applications. magiging matatagtag masyado ride ng nissan mo.
on the upside, sobrang tibay naman daw. basag basag na yung ibang suspension components mo, yung bushing buo pa din.
you may want to check out cruven's website via google and check out their list of services. they fabricate polyurethane bushings and engine supports made of aircraft tyres, i think. mahal lang ng konti sa regular bushings.