If you DO get them, before you install them, make sure either you or someone from a shop inspects the headers for external leaks or holes or something. If you find a leak, have them weld it shut. If anything get the ones that are ceramic coated ones, they'll last a little bit longer.
As JP said check them over if/when you get them. There have been some issues with leaks with a few, but they do give the most added hp over any of the other header available to us. I think the current generation has resolved those issues though. For the price if they do need some extra help, its still a good deal.
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