Stainless, Bushed PRW Rocker Arms

When the Chinese aluminum heads first started becoming a thing, it wasn’t uncommon at all for them to have the bronze guides wear out with rather little use on the heads.
You’d install guides of known better quality, and miraculously they’d last much much longer.
No changes to oiling or any other such issues…….. just replacing the butter soft import bronze pieces with something better solved the problems.
Eventually, they started using better material guides in the heads and the problem kinda went away.

I suspect it’s a similar situation with the bushings in the rockers.