Quote:
Originally Posted by GuidoK
Potentially only on track, with soft ones.
I've had powerflex fcabs for 12 years (roughly 50k miles), which is probably longer than most here, and they are still as new and still have that new feel. NVH is comparable to brand new OEM bushings
So for street use they are very very well suited. Far better than OEM rubber.
Delrin or monoballs is much much harder than PU
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Maybe you haven't read much about them over the years, but you're one of the lucky ones. My Powerflex fcab's failed within 700 miles. Plenty of others have similar experience without having to go to the track - specifically with Powerflex. And most who go *back* to OEM rubber are much happier for street use.
Additional downsides to poly are them drying up and being squeaky. So this requires maintenance. Thus I say, if OEM rubber are still too soft then go all the way and get the monoball or delrin. They are harder but also less likely to fail.