Dynomax Blackjack Headers who uses them?

[chevyc1068]

Does anybody use blackjack headers? I've been looking around for headers and exhaust systems and ran across the Blackjack headers from Dynomax. I'm kind of a fan of Dynomax and I saw that there is an exhaust system that bolts right to the headers. How good of quality are they? Are they comparable to Hooker headers? Because Hooker has some nicely priced headers also with an exhaust system that bolts directly on. Do they last very long? Does the paint wear off fast on them? I'm looking at the basic headers. Does anybody got any useful info for these, like do they flow well, scavenge well, how much power gain, mounting problems, things like that.

Any info would be appreciated. Thanks!!!