Great question and obviously no. Why? Because I know that to get *real* data with sufficient statistical power to be meaningful is a VERY high bar, higher than most people have ever seen unless they are professional engineers with a test budget paid for by someone else. Do you test your setups before and after, at least three times under precisely the same test conditions? Same vehicles, same day, same tire brand, same tire size, same wheel size, same tire pressure, same vehicle temps, same pavement temps, same entry speeds, same throttle position, same turn in points, same turn in rates, etc? If not, then you don't have enough statistical power to hang your hat on. To correctly interpret said data is even more difficult many times. I gave my opinion based on physics principles that I understand related to the dimensions and materials of the sway bar, attachment points, and all the links in the system, among many others. Knowing the bar materials are VERY similar, the dimensions identical in the front bar and within 1mm (~3%) in the rear, identical rear links, and better front links, it is REASONABLE to expect marginally better performance than Hellwig. Given the smaller but adjustable rear - there may be a small difference either way, or it may be so close on a graph it overlays - which is what I would bet on. If I knew the spacing of the holes on the adjustable rear bar, we could get it even closer, in comparison. If you have the Hellwigs (which again are awesome) and haven't upgraded the front links, you are leaving some flex in the front anti-roll bar system and therefore some performance on the table. If we wanted to go through the exercise, I would bet any difference in the two setups would likely be in the noise, especially if you have upgraded the front links. I can say this with certainty: I have eliminated a metric shit ton of flex in both the front and rear anti-roll systems using the biggest, beefiest parts on the market, to the point where the weakest link is the attachment points on one end, and tires on the other. If we lived closer, it would be a hoot to run them over and over, then switch tire/wheels to compare and average, using the video to pull some measurements from (I have done this with jump height blowing up SUVs and other fun stuff), we could put some reasonable numbers on it. I also have enough experience and repetition with these components and systems to recognize trends and stand behind what I said 100%. Said another way, if I am buying ONLY what comes in the Nolathane kit (no links at all) vs only what comes in the Hellwig kit, I am betting the Hellwig kit would be marginally better. I was able to make up the difference by buying actual Hellwig rear links to make it "even" and then the Spohn front links to make it slightly "better." That said, if we both took our vehicles around the same "course" at identical speeds a few times and then switched cars, I doubt we'd be able to tell much difference, i.e. both would feel awesome in equal measure. When the setups are that closely matched, it is rarely worth the effort to reliably quantify any difference in performance. I don't ever mind spending more to get more but when you figure in that I also saved a C-note or two, that makes it a winner to most folks. No wishing needed, I am certain we both have gotten excellent outcomes.
