Your still hung up trying to compare a stock warrantied, EPA legal 131 to a, in your words a "good Stage 2" motor.
There is no warrantied, EPA legal Stage 2 from a dealer that will hang with more cubes.
Sure a non EPA Stage 2 built by an aftermarket shop with an aftermarket tuner will out preform a dealer built stock 131. But that ridiculous to compare the 2,
A warranty matters to some, and to some it doesn't. It doesn't matter to me. I accept the results of my choices
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