Installed on a 2005 Chevrolet Silverado WT 4.8L Gaskets and bushings worked properly. It's been a few months since I've worn them but haven't driven a truck many miles since quarantine and all in 2020 - haven't noticed any leaks and cleaned the valve covers before fitting. While I'm not sure what issues people were having for whatever reason, I had no trouble installing the grommets; I added some lube to each of them before installing them on the stud and I had no problems.
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