Hylift Johnson Lifters Quality Decreasing?

Back in the 2000s when cams were being wiped left right and centre this is the story i heard,
i have no idea if its true. I probably read it here.

Hylift and another company called Stanadyne in the US used to make all of the flat tappet lifters for everyone aftermarket and had big oem contracts as well.
both companies shut up shop on flat tappets when everything went roller lifter and/or overhead cam during the 90s early 2000s the companies concentreated on their big contracts and made new products for the new demands of car makers or in the case of hylift potentially just stopped

then followed the "i wiped my cam" scenario for those rebuilding ancient engines, as lifters from other sources with less good metallergy were "finished" in the US and sold as US made lifters, and all this coincided with some changes to oil specs that propably wouldn't have been noticed if the lifters used had been up to scratch.

the metallurgy and processing of the lifters was the IP of the companies involved, so just setting up shop to make a copy with the exact same properties was not easy. good enough for a standard rebuild was thought to be, good enough

stanadyne became part of a big corporate and stayed with the roller lifters and modern hydraulics
and hylift saw a big enough market in the aftermarket to start again with the flat tappets under new ownership.

hylift have kinda cornerd the market but they know their market, owe their existance to the market they supply, i'd suggest QC is pretty high on their agenda

could be BS i read it on the internet

Dave