50 state legal?
Yeah, unfortunately, I don't believe any of the headers I've seen are legal in California where I now reside. Major bummer, because I've always liked the idea of changing out the exhaust manifold, and the ones on the V8 are very restrictive!!!
The only problem I've ever had with headers are the ones that have the thin flanges. Sometimes they warp and cause exhaust leaks.
But once again, the main dilemma is the smog legality issue in Cali.