So I bit the bullet, and went with just the DP for now. Haven't logged it yet, But I'm expecting at least some reduction in the little bit of KR that I was seeing. Kinda glad I didn't go for the full headers yet, since it was an absolute PITA to get the DP installed (yeah, I know....only 4 bolts, etc.). The 2 nuts at the manifold came off no issue, and with some PB blaster, one of the exhaust side bolts came out fairly easy, but then.....the dreaded *tink* noise of a bolt breaking. I got the factory DP out, but it took some part of 3 more days to get the rest of that bolt out, between work and other obligations, plus not being able to make the kind of noise it took to get it out of there in the middle of the night for my neighbor's sake. So, a couple of days ago, I got everything back together. It took all of 15 mins to put everything back in. There is a minor audible difference, and I don't know that it really feels like it pulls any harder, but I've only driven it once or twice since. Progress.....slow, painful progress.....