[1320racer]

The only roller lifter I'll use in my engines is Crower's Servere Duty w/HIPPO.

.842 diameter lifter and last 2 sets in my 468 were pulled from service after 1000 passes each seeing 7200 RPM every pass just because and they looked and felt like they could go another 1000 passes.

Run the same lifter in my 522 and the last set was pulled after 500 passes seeing 8000 RPM every pass and they too looked and felt like they just came out of the box.