Absolutlely no problems with my Jaycee pushrods, 3 years on my engine and no leaks yet, I also used the white cheap orings, they seemed to be the better option. Countless trips down the track, and on the road getting the engine way beyond normal oporating temps, and, they still do not leak. They were well sealed with Aviation thread sealant around the orings. Mine are fit to the stock vw head.
Kevin