In a racing weekend, I shift near/at redline around 400 times (every upshift). Probably 10 hit the rev limiter. I'd have to check the ECU for the number of downshift over-rev counts - I am sure that there are a few. Then I do this 15 weekends a year; so 6,000 shifts at redline per year. And I do this on the original IMS bearing with 94,000 miles.
These engines are actually pretty tough.
I lost count.... is this engine 3 or 4?
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1995 Porsche C4 Cab
2016 BMW M2, 6 Speed LBB - ED 7/2016
1997 993 Cab - Sold; 1997 993 Turbo - Sold
2001 Boxster S - Original Owner - 30K Miles -SOLD