how about a 2004.5 LLY with 2006 LBZ parts ? does that count ? seriously, if you haven't seen it yet, its the turbo inlet mouthpiece off an 06 LBZ +a true cold air intake, in my case I have the entire 06 assembly that if not entirely , then mostly deals with the overheat / can't breath problem / mileage issues that the LLY's suffer. I picked up a whole lotta responsiveness and a couple mpg's just by swapping in the 06 turbo mp. Plus my ac blows colder due to the diminished heat going thru the stack. I am now averaging combined city/highway mpg at the level I used to get strictly highway. I now get 16.5 combined, haven't checked all highway yet. And its real world measurement, filled to the same place in the neck so I can hand calculate it.
dc