You are both using highly efficient mandrel bent piping, with straight through mufflers. A couple extra bends is not going to make a huge difference on 7psi of boost. I do agree that the straighter design will likely be a little higher, I just don't see it being more than a few horsepower. If you can prove me wrong then by all means show me the numbers comparison when you have your boosted Z and I'll be more than happy to tell you I was wrong
DDM said his intentions were to dyno his car in its current form and use that as a baseline, then add the exhaust and dyno again for the gains. He was never trying to mis-lead anyone.
Why did they not dyno it with the stock cats? Because DDM has had the cats on his car for months now and didn't want to have to pull them off and reinstall everything stock just to get a dyno number. Using a baseline with his current and showing the increase is sufficient to show that the exhaust makes similar power to other competitors. With his only access to a dyno being another shop that is hard to make appointments, I don't see a problem with this.
I am pointing out that compared to your high flow cat and cat back combo dyno pull compared to your baseline, you made less overall power than the Berk combo did when looking at their individual gains. Yes, the dyno situations were not the same, which may mean we are retarded for arguing about it over the internet, but it's going to be VERY difficult for either of us to prove anything unless we got the same car, dyno'd it completely stock, then dropped the stock exhaust and dyno'd it with the FI cats and CBE, then dropped that and dynod it with the Berk cats and CBE.
I doubt we are going to get the chance to do that, so for now we can continue to try and make our points
