All part of the "Longevity" issues I cited at the start of this thread, Ti valve wears on the Hardened stock seats, valve recedes and closes the Lash, if you don't swap in new shims the valve hangs open a touch as the clearence closes up and torches the valve, end of engine.
Jump on HPF's site and check the Ferrea prices on Keepers and Retainers to compare prices, from memory that sounds like a good price but I did mine years ago.
Jump on HPF's site and check the Ferrea prices on Keepers and Retainers to compare prices, from memory that sounds like a good price but I did mine years ago.