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The ZR1 runs 10.5 PSi for 638 HP, but is stronger internally than the LSA. GM will NEVER put the boost up to 15 for reliability reasons and I am sure to safely handle it, it would need to be beefed up, so we are in a modding war and there is no fair comparison, we might as well be saying the GT500 needs .4 liters of displacement.
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