you said 2nd kill with 350 miles on the car. that means you've probably hit and/or exceeded redline a few times. i just wondered if there was any break in period on these motors. i've read a lot about breaking in the motor, for hte first 1000 miles, not taking it over 5,000 rpm and 100 mph. a bmw manual specifically tells you not to run above 4500 rpm for the first 1200 miles. nice kill on the bimmer and 5.0 by the way, i don't mean to shadow your posting, it just threw up a red flag to me. let me know what you think because i currently have about the same miles as you.