There was mention of a power kit at Sema last winter coming out mid summer which will keep the warranty in tact. I spoke with a Ford Racing rep at the Woodward Dream Cruise in the Mustang Alley Ford Racing section. He said that all the Ford employees who have driven a ST with this new tune have said it's a significant difference, although he hasn't yet. When I asked when it's coming out, they're still working on it so no time is given. I mentioned the Boss track key being held up by California emissions being the same hold up and he said that's exactly what the hold up is.