It does smooth out the airflow of the 2 turbo outlets though.... that's why nismo have a piping kit that does the same thing.
Okay drag day 2011, lined up Sloane 7 times and beat him every time....I had, stock 26, -9's running 290-300AWKW full tank 1600 odd kgs, he had 32GTR 347AWKW, cams, turbos similar to 2530's but a bit laggier, nismo copper twin, and weighed 116KG less than my 34.
I beat him because the -9's came on earlier when launching off the line and came onto boost faster after changing gears. Even with his lighter, more powerfull car he got beat. The video shows that area under the curve. Peak power is easy....
I smiled when he said he couldn't believe I kept beating him and said the numbers just don't add up. I explained and he understood.
Now he's going -5's for that higher HP goal, I'm building his new engine, still a stock stroke RB26DETT, so I guess he might be better off now with the -5's but it still won't be as responsive....each to their own I guess.
I'll aim for 330WKW at 20-22PSI once new twin plate and tune done and see where we stand.