The product is ok, the problem as all the major builders learned is that QC was poor to non-existent. Search RX7Club or if you're in the know then you can ask directly for yourself.

If you're NA, new housings and ceramic apex seals with proper oiling will last through many rebuilds. If you're FI and the ceramics fracture into loose pieces rather than just crack then hardening won't save you anyway.

In otherwords, by and large this is a WOB ...