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The dyno's I have found dont test with headers, so I have no idea how much HP would be lost with the logs.



I have seen tests on small blocks back to back, as much as 40 hp left on the table. And that was at a 300 hp level.

30hp minimum would the floor but with a 400hp motor I think it would be higher than 40 hp.



"I think its got a hemi"