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Those numbers look about 20-30 high on each. I have basically the same mods with a tune and hit 320 rwhp on the TTP dyno back in May on a nice day at their old location. Those look very optimistic, especially without a tune. Did they dyno anyone else recently that you can compare the numbers to?
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69 Z28 JL8 4 wheel disc brakes - being restored
09 Silverado Z71
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