Nameless headers IIRC also provided nice gains mid so i guess difference might be lesser then vs something like for example common UEL headers .. that was one of points they chosen during design phase going for mid optimization with also long-tube design instead of something like PTuning's that concentrated on top rpms for track use. That of course if my memory serves me right from reading that VEERY long thread of making/designing of nameless headers few years ago. Pitty Nameless still has that torque dip though, but otherwise they also have quality product.. just that in my eyes ace is better
. No torque dip, among best welds i've seen, mandrel bent, low angle collector. Where are flaws, damnit?