It had a lean spot, the first one never really "turned on" because the engine didn't have enough air. It didn't even really move on the dyno. The second had the air flow and the combo worked. The first one made power but the intake temps were high and the stress on the engine was high, backpressure was high.
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handle every stressful situation like a dog: if you can't eat it or play with it, just pee on it and walk away.