Quote:
Originally Posted by Clyde65
I know the EPA said it, but I dont buy it myself. either way you will get marked better mileage than a NA small block, better starting and not to mention the cool factor.
Also your 2006 5.3 will probably have VVT and AFM on it. that would also attribute to increased mileage but maybe not increased driving pleasure.
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And of course all the extras means more stuff to break
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