Lol, damn I gotta get me some cheetah blood then. XD
Anyways MSD coils have been known to go bad. I have them, and the first set, all 3 coils literally split open within 3 months of having them on. MSD said "sorry, have theses and some money" And they've been fine since.
But I saw no performance increase, its all just for show really. If mine go out again, Im gonna get my money back and just get stock coils.
Also, a DP will help reduce KR, but not NEARLY as much as headers. Also, the off the shelf PCM tunes seem to be hit or miss, so try to find someone who can tune for you.