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I'm more talking about the relative increase because 183hp stock is also 15hp higher than some dyno charts. I'm guessing the downpipe adds about 5-10 hp to flashpro without tuning

Is this done on a Dynojet? It would have been interesting to see the Hondata without the downpipe. I would assume that the Hondata alone would have accounted for most of the gain given the blue line to green line is similar to Hondata's results.