High RPM engine failure could be a due to a million and one things, it's going to be nearly impossible to trace it back to the Fluidampr, that is to say if it is the culprit.
Honestly I don't even get why people change their crank pulleys. Unless you're building some 9000rpm high rev/NA screamer, pushing the rotating assembly to its absolute limit, the OEM pulley should suffice.
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