While I'm at it - how bout max RPM?
I think the new M5 is 7200RPM fuel cutoff according to the press release. The Mercedes 6.2L V8 was also 7200RPM, but I don't know if the new 5.5L turbo is the same. I want to say 6800RPM for the Caddy - but that's purely from vague memory of the LS-A specs.