I am questioning whether or not they were in fact johnson hylift as I was told they were,they came in bulk and from a reputable cam company. I was in there a while ago and they said now they are not sure where the stuff is coming from, possibly mexico as the us plants (detroit) were shut down from covid19. That is the main reason I will only use the lunati microtrol lifters as I know they are us made and of good quality to take the guess work out of it. I had great luck with summit lifters for many years with lazy and fast rate cams but I cannot take the chance anymore. Of course now i try to talk anyone building a performance engine into a solid flat tappet.
