Originally Posted by KillerBMotorsport
I have a few other comparisons, but in general with the longer primary type headers and 1.5 scroll headers (Invidia, GP Moto, etc.) you see significantly reduced spool time and power carried higher into the revs. With the shorter and smaller diameter primary type headers (Perrin, GTSpec, etc.) you'll see similar or better spool time with decent gains higher in the revs.
Here's a comparison to Perrin's headers (Killer B setup dashed lines)...
Looks like a bit more boost with your header up top is causing the increase in power. With the Perrin test, it looks like there was a boost leak or a pre-turbo exhaust leak... notice the torque peak is well after 4k RPM. This could also explain the lower boost levels up top.
BTW, I'm not saying your product is not good, but we all have to be very careful about how we run tests like this to make sure they're fair. I don't want this to turn into another Garage GT fiasco