Replace stock Harmonic Balancer?

You're right! This one is made in China, but they do make a SFI approved one. If that's any help.

Professional Products Harmonic Dampers... Any good? • Speed Talk
Here's some failures on this subject.
Hope this helps.
Hmm, that thread makes me question my decision. Im not going to be racing, just a street/cruise vehicle looking for low end performance. If I get up to 6k rpm I'm doing something wrong...

Anyone know of a sub $100 US made one that is reliable?