Mine obviously lived for the time I used them. I guess it's possible the broken
SIRs I've seen were just bad heat lot flukes but, I took them out at the end of
the year.........after seeing several posts on the subject.

I ran Ross 99626 domes (567 grams) 7400 RPM every shift and the occasional
8000 limiter burnout.........so they can't be complete junk. Just didn't care to
test what others had already found out.

Personally, I'd never use them again.......even in somebody else's engine.