The new SZ 3" splits are available if you email Greg/Seb. Mine are going in tomorrow @zcargarge, along with their 3" testipe with 2.5" collector and 2.5" labree exhaust.
We'll see how they respond on the dyno tomorrow. Based on dyno sheets that I've seen so far and speaking to a few who have upgraded from the previous 2.5" split downpipes, they are far superior. Faster spoolup and stronger mid range.