That AFE twisted down pipe isn’t any more expensive than a good set of Kooks. I considered them but I heard a number of complaints about overall quality, workmanship, etc.
Further, just because the downpipes are equalized doesn’t translate into the same sound Ford is making with their equalized exhaust. There is much more trickery to their exhaust than just the equal length. I believe it is acoustically tuned much like a musical instrument.... to highlight certain frequencies and cancel others... to arrive at a more pleasing sound.
borla, who they use to make their FOMOCO performance exhaust.... had been heavily involved in this acoustic exhaust research a few years ago. I wouldn’t be surprised if Ford isn’t capitalizing on it.