I have heard good things about them, I just put in a S&K rebuild from WA. cost 1024, with a 200 core charge. 7yr,70,000mile warrenty. I have creaked the header as well, Rubicon Outfitters Stainless, they are replacing it. Something to do with the high heat that a new engine puts off during break in. If that price includes shipping to the local NAPA, go for it.