It has been discussed and I think somebody did it or is going to do it. I was considering it pretty seriously for a long while but the bottom line is, as long as the car runs well, I'm not all that motivated to mess with it, especially since some of us have predicted the potential econo improvement to be less than 20% which for my car would be less than 7 mpg.
I'm surprised you took out #3 and #4- did it shake and/or sound bad? I'd take out pairs 1-4 or 2-3.
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