Does anyone have and extra head that is in working conditions, or is repairable? I would really like to rebuild my M5 that has been sitting in the garage for a year now.
I can commiserate - my M5 sat for a considerable amount of time before I sourced a used cylinder head. The original head I removed is "bowed" (end to end) approx 0.035". I never got around to finding a shop capable of straightening it so I could sell it. Send me a PM and we can discuss this further.