I usually use a beak in oil versus an additive for break in. Driven BR is what I generally use.
Crower’s lifters are made by Eaton. Most of Summit’s flat tappet lifters are made by Eaton too.
The only USA made HFT lifters are from HLJ. They make the lifter bodies for Howard’s and Rhoad’s. HLJ use to make the lifter bodies for Howard’s, Lunati, Crower, and many others. After their price leap a few years ago Crower has not used HLJ lifters for a few years.
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