Note that the run below was "shifted" a bit. We had the dyno calibration off by 200-300RPM on the baseline and didn't realize this until after we finished up last night. The power from stock and the header were nearly identical until almost 3,000RPM.
@ 6800-7000 it was roughly 25-30WHP gain, and 7200 ~40WHP (SAE corrected). The header just kept making power up top. I think with some minor cam adjustments I can actually hold the power out longer but I already increased the rev limit slightly and I don't know how far we can consider "safe" to push the rev limit on this engine in stock form.
Earlier runs I had ~3-5WTQ more throughout the powerband and I had pulled it out with a quick change to make the tune conservative as I knew Colton would be back with an overpipe for further testing in the next few weeks. If you note the torque "bump"at around 6,200RPM thats about where the tq was earlier during the day.